commit e6b9c0f652ff929ab38c3b2ad0fabff6d37740cc
Author: pro100ton <pro100ton@gmail.com>
Date:   Sat Nov 2 15:32:43 2024 +0300

    Docker deep dive book materials

diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..4d92b67
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "ddd-book"]
+	path = ddd-book
+	url = https://github.com/nigelpoulton/ddd-book.git
diff --git a/ddd-book/README.md b/ddd-book/README.md
new file mode 100644
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--- /dev/null
+++ b/ddd-book/README.md
@@ -0,0 +1,7 @@
+# Docker Deep Dive
+
+This repos contains the apps and config files for the 2023 edition of Docker Deep Dive.
+
+### Folders and container images
+
+**multi-container:** Compose app and app code. Used to build ``
diff --git a/ddd-book/multi-contianer/.DS_Store b/ddd-book/multi-contianer/.DS_Store
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index 0000000..99e9a78
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diff --git a/ddd-book/multi-contianer/Dockerfile b/ddd-book/multi-contianer/Dockerfile
new file mode 100644
index 0000000..28a19c6
--- /dev/null
+++ b/ddd-book/multi-contianer/Dockerfile
@@ -0,0 +1,16 @@
+# Base image
+FROM python:alpine
+
+# Copy app, templates and views
+COPY . /app
+
+# Set working directory for subsequent commands
+WORKDIR /app
+
+# Install dependencies
+RUN pip install -r requirements.txt
+
+EXPOSE 8080
+
+# Command to run when container starts
+ENTRYPOINT ["python", "app/app.py"]
diff --git a/ddd-book/multi-contianer/README.md b/ddd-book/multi-contianer/README.md
new file mode 100644
index 0000000..ecb942a
--- /dev/null
+++ b/ddd-book/multi-contianer/README.md
@@ -0,0 +1,7 @@
+# Simple counter-app for demonstrating Docker Compose
+Flask app that displays SAFC image and counts page refreshes in Redis backend.
+
+**Used in:**
+- Getting Started with Docker video training course (2023 edition)
+
+**Pre-built image:** [Docker Hub](https://hub.docker.com/repository/docker/nigelpoulton/gsd/) **tag:** `compose2023`
diff --git a/ddd-book/multi-contianer/app/.DS_Store b/ddd-book/multi-contianer/app/.DS_Store
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index 0000000..722c249
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diff --git a/ddd-book/multi-contianer/app/app.py b/ddd-book/multi-contianer/app/app.py
new file mode 100644
index 0000000..b932428
--- /dev/null
+++ b/ddd-book/multi-contianer/app/app.py
@@ -0,0 +1,25 @@
+import time
+import redis
+from flask import Flask, render_template
+
+app = Flask(__name__)
+cache = redis.Redis(host='redis', port=6379)
+
+def get_hit_count():
+    retries = 5
+    while True:
+        try:
+            return cache.incr('hits')
+        except redis.exceptions.ConnectionError as exc:
+            if retries == 0:
+                raise exc
+            retries -= 1
+            time.sleep(0.5)
+
+@app.route("/")
+def index():
+    count = get_hit_count()
+    return render_template('index.html', count=count)
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=8080, debug=True)
diff --git a/ddd-book/multi-contianer/app/static/.DS_Store b/ddd-book/multi-contianer/app/static/.DS_Store
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diff --git a/ddd-book/multi-contianer/app/static/css/.DS_Store b/ddd-book/multi-contianer/app/static/css/.DS_Store
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diff --git a/ddd-book/multi-contianer/app/static/css/main.css b/ddd-book/multi-contianer/app/static/css/main.css
new file mode 100644
index 0000000..6af7732
--- /dev/null
+++ b/ddd-book/multi-contianer/app/static/css/main.css
@@ -0,0 +1,81 @@
+body {
+  margin: 0;
+  padding: 0;
+  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+  color: #444;
+}
+/*
+ * Formatting the header area
+ */
+header {
+  background-color: #f80000;
+  height: 35px;
+  width: 100%;
+  opacity: .9;
+  margin-bottom: 10px;
+}
+header h1.logo {
+  margin: 0;
+  font-size: 1.7em;
+  color: #fff;
+  text-align: center;
+}
+header h1.logo:hover {
+  color: #fff;
+  text-decoration: none;
+}
+/*
+ * Centering the body content
+ */
+.container {
+  width: 1200px;
+  margin: 0 auto;
+}
+div.home {
+  padding: 10px 0 30px 0;
+  background-color: #E6E6FA;
+  -webkit-border-radius: 6px;
+     -moz-border-radius: 6px;
+          border-radius: 6px;
+}
+div.about {
+  padding: 10px 0 30px 0;
+  background-color: #E6E6FA;
+  -webkit-border-radius: 6px;
+     -moz-border-radius: 6px;
+          border-radius: 6px;
+}
+h2 {
+  font-size: 2.2em;
+  margin-top: 40px;
+  text-align: center;
+  letter-spacing: -2px;
+}
+h3 {
+  font-size: 2em;
+  font-weight: 150;
+  margin-top: 30px;
+  text-align: center;
+  letter-spacing: -1px;
+  color: #282626;
+}
+.menu {
+  float: right;
+  margin-top: 8px;
+}
+.menu li {
+  display: inline;
+}
+.menu li + li {
+  margin-left: 35px;
+}
+.menu li a {
+  color: #444;
+  text-decoration: none;
+}
+.center {
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+  width: 50%;
+}
\ No newline at end of file
diff --git a/ddd-book/multi-contianer/app/static/images/.DS_Store b/ddd-book/multi-contianer/app/static/images/.DS_Store
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diff --git a/ddd-book/multi-contianer/app/static/images/image.png b/ddd-book/multi-contianer/app/static/images/image.png
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diff --git a/ddd-book/multi-contianer/app/templates/error.html b/ddd-book/multi-contianer/app/templates/error.html
new file mode 100644
index 0000000..1d7761b
--- /dev/null
+++ b/ddd-book/multi-contianer/app/templates/error.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Error page</title>
+</head>
+<body>
+    Throwing an error
+</body>
+</html>
diff --git a/ddd-book/multi-contianer/app/templates/index.html b/ddd-book/multi-contianer/app/templates/index.html
new file mode 100644
index 0000000..199fc90
--- /dev/null
+++ b/ddd-book/multi-contianer/app/templates/index.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <meta charset="UTF-8">
+        <title>Suck my pipa</title>
+        <link rel="stylesheet" href="{{ url_for('static', filename='css/main.css') }}">
+    </head>
+    <body>
+        <img src="/static/images/image.png" alt="NP logo" class="center">
+        <header>
+        <div class="container">
+            <h1 class="logo">Suck my pipa</h1>
+        </div>
+        </header>
+    <div class="container">
+        <h2>Hit refresh if you think Sunderland AFC are the greatest football team in the world ;-)</h2>
+        <h3>You've refreshed bibas <b>{{ count }}</b> times</h3>
+    </div>
+  </body>
+</html>
diff --git a/ddd-book/multi-contianer/compose.yaml b/ddd-book/multi-contianer/compose.yaml
new file mode 100644
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--- /dev/null
+++ b/ddd-book/multi-contianer/compose.yaml
@@ -0,0 +1,24 @@
+networks:
+  counter-net:
+
+volumes:
+  counter-vol:
+  
+services:
+  web-fe:
+    build: .
+    command: python app.py
+    ports:
+      - target: 8080
+        published: 5001
+    networks:
+      - counter-net
+    volumes:
+      - type: volume
+        source: counter-vol
+        target: /app
+  redis:
+    image: "redis:alpine"
+    networks:
+      counter-net:
+
diff --git a/ddd-book/multi-contianer/requirements.txt b/ddd-book/multi-contianer/requirements.txt
new file mode 100644
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--- /dev/null
+++ b/ddd-book/multi-contianer/requirements.txt
@@ -0,0 +1,3 @@
+flask
+redis
+jinja2
\ No newline at end of file
diff --git a/ddd-book/multi-stage/.DS_Store b/ddd-book/multi-stage/.DS_Store
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diff --git a/ddd-book/multi-stage/Dockerfile b/ddd-book/multi-stage/Dockerfile
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--- /dev/null
+++ b/ddd-book/multi-stage/Dockerfile
@@ -0,0 +1,16 @@
+FROM golang:1.20-alpine AS base
+WORKDIR /src
+COPY go.mod go.sum .
+RUN go mod download
+COPY . .
+
+FROM base AS build-client
+RUN go build -o /bin/client ./cmd/client
+
+FROM base AS build-server
+RUN go build -o /bin/server ./cmd/server
+
+FROM scratch AS prod
+COPY --from=build-client /bin/client /bin/
+COPY --from=build-server /bin/server /bin/
+ENTRYPOINT [ "/bin/server" ]
diff --git a/ddd-book/multi-stage/Dockerfile-final b/ddd-book/multi-stage/Dockerfile-final
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index 0000000..08ff162
--- /dev/null
+++ b/ddd-book/multi-stage/Dockerfile-final
@@ -0,0 +1,19 @@
+FROM golang:1.20-alpine AS base
+WORKDIR /src
+COPY go.mod go.sum .
+RUN go mod download
+COPY . .
+
+FROM base AS build-client
+RUN go build -o /bin/client ./cmd/client
+
+FROM base AS build-server
+RUN go build -o /bin/server ./cmd/server
+
+FROM scratch AS prod-client
+COPY --from=build-client /bin/client /bin/
+ENTRYPOINT [ "/bin/client" ]
+
+FROM scratch AS prod-server
+COPY --from=build-server /bin/server /bin/
+ENTRYPOINT [ "/bin/server" ]
diff --git a/ddd-book/multi-stage/README.md b/ddd-book/multi-stage/README.md
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index 0000000..5f6e314
--- /dev/null
+++ b/ddd-book/multi-stage/README.md
@@ -0,0 +1,9 @@
+# Multi-stage builds
+
+This example is based on the [Docker sample buildme repo])(https://github.com/dockersamples/buildme) and contains a simple client server app written on Go.
+
+## App code
+
+The app code is in the `cmd` directory but you don't need to interact with the app code or be a Go programmer.
+
+
diff --git a/ddd-book/multi-stage/cmd/client/main.go b/ddd-book/multi-stage/cmd/client/main.go
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index 0000000..4c98781
--- /dev/null
+++ b/ddd-book/multi-stage/cmd/client/main.go
@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func main() {
+	err := ping()
+	if err != nil {
+		fmt.Println(err.Error())
+		os.Exit(1)
+	}
+	err = start()
+	if err != nil {
+		fmt.Println(err.Error())
+		os.Exit(1)
+	}
+}
diff --git a/ddd-book/multi-stage/cmd/client/request.go b/ddd-book/multi-stage/cmd/client/request.go
new file mode 100644
index 0000000..6bf0d59
--- /dev/null
+++ b/ddd-book/multi-stage/cmd/client/request.go
@@ -0,0 +1,39 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"os"
+)
+
+var baseURL string = "http://localhost"
+var port string = "3000"
+var requestUrl string = fmt.Sprintf("%s:%s?s=", baseURL, port)
+
+func ping() error {
+	res, err := http.Get(requestUrl)
+	if err != nil {
+		return err
+	}
+	if res.StatusCode != http.StatusOK {
+		return errors.New("failed to establish server connection")
+	}
+	return nil
+}
+
+func getTranslation(msg string) string {
+	translationRequest := requestUrl + url.QueryEscape(msg)
+	response, err := http.Get(translationRequest)
+	if err != nil {
+		fmt.Printf("[error] http request failed: %s", err)
+		os.Exit(1)
+	}
+	body, err := io.ReadAll(response.Body)
+	if err != nil {
+		fmt.Printf("[error] failed to parse server response: %s", err)
+	}
+	return string(body)
+}
diff --git a/ddd-book/multi-stage/cmd/client/ui.go b/ddd-book/multi-stage/cmd/client/ui.go
new file mode 100644
index 0000000..33bd4d3
--- /dev/null
+++ b/ddd-book/multi-stage/cmd/client/ui.go
@@ -0,0 +1,105 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/charmbracelet/bubbles/textinput"
+	"github.com/charmbracelet/bubbles/viewport"
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+)
+
+func start() error {
+	p := tea.NewProgram(initialModel(), tea.WithAltScreen())
+
+	_, err := p.Run()
+	return err
+}
+
+type (
+	errMsg error
+)
+
+type model struct {
+	viewport  viewport.Model
+	messages  []string
+	textinput textinput.Model
+	exitHint  lipgloss.Style
+	err       error
+}
+
+func initialModel() model {
+	ti := textinput.New()
+	ti.Placeholder = "Translate a message..."
+	ti.Focus()
+
+	ti.CharLimit = 42
+
+	ti.Width = 42
+
+	vp := viewport.New(42, 2)
+	vp.SetContent(`Hit Enter to translate.`)
+	vp.Style = lipgloss.NewStyle().
+		BorderStyle(lipgloss.RoundedBorder()).
+		BorderForeground(lipgloss.Color("69")).
+		Padding(0, 1).
+		MarginLeft(1)
+
+	return model{
+		textinput: ti,
+		messages:  []string{},
+		viewport:  vp,
+		exitHint:  lipgloss.NewStyle().Faint(true).MarginLeft(1),
+		err:       nil,
+	}
+}
+
+func (m model) Init() tea.Cmd {
+	return textinput.Blink
+}
+
+func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	var (
+		tiCmd tea.Cmd
+		vpCmd tea.Cmd
+	)
+
+	m.textinput, tiCmd = m.textinput.Update(msg)
+	m.viewport, vpCmd = m.viewport.Update(msg)
+
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		switch msg.Type {
+		case tea.KeyCtrlC, tea.KeyEsc:
+			fmt.Println(m.textinput.Value())
+			return m, tea.Quit
+		case tea.KeyEnter:
+			translated := getTranslation(m.textinput.Value())
+
+			m.messages = append(
+				m.messages,
+				"Input: "+m.textinput.Value(),
+				"Translation: "+translated,
+			)
+			m.viewport.SetContent(strings.Join(m.messages, "\n"))
+			m.textinput.Reset()
+			m.viewport.GotoBottom()
+		}
+
+	// We handle errors just like any other message
+	case errMsg:
+		m.err = msg
+		return m, nil
+	}
+
+	return m, tea.Batch(tiCmd, vpCmd)
+}
+
+func (m model) View() string {
+	return fmt.Sprintf(
+		"\n%s\n%s\n",
+		m.textinput.View(),
+		m.viewport.View(),
+	) + m.exitHint.Render("Ctrl+C to exit.")
+}
diff --git a/ddd-book/multi-stage/cmd/server/main.go b/ddd-book/multi-stage/cmd/server/main.go
new file mode 100644
index 0000000..68898d9
--- /dev/null
+++ b/ddd-book/multi-stage/cmd/server/main.go
@@ -0,0 +1,29 @@
+package main
+
+import (
+	"log"
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/chi/v5/middleware"
+)
+
+// version is defined using build args
+var version string
+
+func main() {
+	if version != "" {
+		log.Printf("Version: %s", version)
+	}
+	r := chi.NewRouter()
+	r.Use(middleware.Logger)
+	r.Get("/", func(w http.ResponseWriter, r *http.Request) {
+		msg := r.URL.Query().Get("s")
+		translated := translate(msg)
+		w.Write([]byte(translated))
+	})
+
+	log.Println("Starting server...")
+	log.Println("Listening on HTTP port 3000")
+	log.Fatal(http.ListenAndServe(":3000", r))
+}
diff --git a/ddd-book/multi-stage/cmd/server/translate.go b/ddd-book/multi-stage/cmd/server/translate.go
new file mode 100644
index 0000000..bbcc5d3
--- /dev/null
+++ b/ddd-book/multi-stage/cmd/server/translate.go
@@ -0,0 +1,28 @@
+package main
+
+import (
+	"strings"
+	"unicode"
+)
+
+func translate(msg string) string {
+	msg = strings.ToLower(msg)
+	var b strings.Builder
+	for _, char := range msg {
+		if unicode.IsLetter(char) {
+			switch char {
+			case 'a', 'e', 'i', 'o', 'u', 'y', 'å', 'ä', 'ö':
+				b.WriteRune(char)
+			default:
+				b.WriteRune(char)
+				b.WriteRune('o')
+				b.WriteRune(char)
+			}
+			continue
+		}
+		if unicode.IsSpace(char) {
+			b.WriteRune(' ')
+		}
+	}
+	return b.String()
+}
diff --git a/ddd-book/multi-stage/go.mod b/ddd-book/multi-stage/go.mod
new file mode 100644
index 0000000..cb9f503
--- /dev/null
+++ b/ddd-book/multi-stage/go.mod
@@ -0,0 +1,28 @@
+module github.com/dvdksn/buildme
+
+go 1.20
+
+require (
+	github.com/charmbracelet/bubbles v0.14.0
+	github.com/charmbracelet/bubbletea v0.23.1
+	github.com/charmbracelet/lipgloss v0.6.0
+	github.com/go-chi/chi/v5 v5.0.0
+)
+
+require (
+	github.com/atotto/clipboard v0.1.4 // indirect
+	github.com/aymanbagabas/go-osc52 v1.0.3 // indirect
+	github.com/containerd/console v1.0.3 // indirect
+	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
+	github.com/mattn/go-isatty v0.0.16 // indirect
+	github.com/mattn/go-localereader v0.0.1 // indirect
+	github.com/mattn/go-runewidth v0.0.14 // indirect
+	github.com/muesli/ansi v0.0.0-20211018074035-2e021307bc4b // indirect
+	github.com/muesli/cancelreader v0.2.2 // indirect
+	github.com/muesli/reflow v0.3.0 // indirect
+	github.com/muesli/termenv v0.13.0 // indirect
+	github.com/rivo/uniseg v0.2.0 // indirect
+	golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab // indirect
+	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
+	golang.org/x/text v0.3.7 // indirect
+)
diff --git a/ddd-book/multi-stage/go.sum b/ddd-book/multi-stage/go.sum
new file mode 100644
index 0000000..f1892a3
--- /dev/null
+++ b/ddd-book/multi-stage/go.sum
@@ -0,0 +1,60 @@
+github.com/atotto/clipboard v0.1.4 h1:EH0zSVneZPSuFR11BlR9YppQTVDbh5+16AmcJi4g1z4=
+github.com/atotto/clipboard v0.1.4/go.mod h1:ZY9tmq7sm5xIbd9bOK4onWV4S6X0u6GY7Vn0Yu86PYI=
+github.com/aymanbagabas/go-osc52 v1.0.3 h1:DTwqENW7X9arYimJrPeGZcV0ln14sGMt3pHZspWD+Mg=
+github.com/aymanbagabas/go-osc52 v1.0.3/go.mod h1:zT8H+Rk4VSabYN90pWyugflM3ZhpTZNC7cASDfUCdT4=
+github.com/charmbracelet/bubbles v0.14.0 h1:DJfCwnARfWjZLvMglhSQzo76UZ2gucuHPy9jLWX45Og=
+github.com/charmbracelet/bubbles v0.14.0/go.mod h1:bbeTiXwPww4M031aGi8UK2HT9RDWoiNibae+1yCMtcc=
+github.com/charmbracelet/bubbletea v0.21.0/go.mod h1:GgmJMec61d08zXsOhqRC/AiOx4K4pmz+VIcRIm1FKr4=
+github.com/charmbracelet/bubbletea v0.23.1 h1:CYdteX1wCiCzKNUlwm25ZHBIc1GXlYFyUIte8WPvhck=
+github.com/charmbracelet/bubbletea v0.23.1/go.mod h1:JAfGK/3/pPKHTnAS8JIE2u9f61BjWTQY57RbT25aMXU=
+github.com/charmbracelet/harmonica v0.2.0/go.mod h1:KSri/1RMQOZLbw7AHqgcBycp8pgJnQMYYT8QZRqZ1Ao=
+github.com/charmbracelet/lipgloss v0.5.0/go.mod h1:EZLha/HbzEt7cYqdFPovlqy5FZPj0xFhg5SaqxScmgs=
+github.com/charmbracelet/lipgloss v0.6.0 h1:1StyZB9vBSOyuZxQUcUwGr17JmojPNm87inij9N3wJY=
+github.com/charmbracelet/lipgloss v0.6.0/go.mod h1:tHh2wr34xcHjC2HCXIlGSG1jaDF0S0atAUvBMP6Ppuk=
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diff --git a/ddd-book/swarm-app/.DS_Store b/ddd-book/swarm-app/.DS_Store
new file mode 100644
index 0000000..9a0a61f
Binary files /dev/null and b/ddd-book/swarm-app/.DS_Store differ
diff --git a/ddd-book/swarm-app/Dockerfile b/ddd-book/swarm-app/Dockerfile
new file mode 100644
index 0000000..28a19c6
--- /dev/null
+++ b/ddd-book/swarm-app/Dockerfile
@@ -0,0 +1,16 @@
+# Base image
+FROM python:alpine
+
+# Copy app, templates and views
+COPY . /app
+
+# Set working directory for subsequent commands
+WORKDIR /app
+
+# Install dependencies
+RUN pip install -r requirements.txt
+
+EXPOSE 8080
+
+# Command to run when container starts
+ENTRYPOINT ["python", "app/app.py"]
diff --git a/ddd-book/swarm-app/README.md b/ddd-book/swarm-app/README.md
new file mode 100644
index 0000000..4b4673b
--- /dev/null
+++ b/ddd-book/swarm-app/README.md
@@ -0,0 +1,21 @@
+# Simple counter-app for demonstrating Docker Compose
+Flask app that counts page refreshes in Redis backend and displays the name of the container that services each request.
+
+**Used in:**
+- Docker Deep Dive book 2023 edition
+
+**Pre-built image:** [](https://hub.docker.com/repository/docker/nigelpoulton/ddd-book/) **tag:** `swarm-app`
+
+### v2 app
+
+The `swarm-appv2` tag was built by making two changes to the app.
+
+Changing the image referenced in `index.html` from `image.png` to `wasm.ong` and changing the text.
+
+Changing the CSS to:
+
+```
+header {
+  background-color: #5a2d8c;
+```
+
diff --git a/ddd-book/swarm-app/app/.DS_Store b/ddd-book/swarm-app/app/.DS_Store
new file mode 100644
index 0000000..7e66bfe
Binary files /dev/null and b/ddd-book/swarm-app/app/.DS_Store differ
diff --git a/ddd-book/swarm-app/app/app.py b/ddd-book/swarm-app/app/app.py
new file mode 100644
index 0000000..1ea2928
--- /dev/null
+++ b/ddd-book/swarm-app/app/app.py
@@ -0,0 +1,27 @@
+import time
+import redis
+from flask import Flask, render_template
+import socket
+
+app = Flask(__name__)
+cache = redis.Redis(host='redis', port=6379)
+
+def get_hit_count():
+    retries = 5
+    while True:
+        try:
+            return cache.incr('hits')
+        except redis.exceptions.ConnectionError as exc:
+            if retries == 0:
+                raise exc
+            retries -= 1
+            time.sleep(0.5)
+
+@app.route("/")
+def index():
+    count = get_hit_count()
+    hostname = socket.gethostname()
+    return render_template('index.html', hostname=hostname, count=count)
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=8080, debug=True)
diff --git a/ddd-book/swarm-app/app/static/.DS_Store b/ddd-book/swarm-app/app/static/.DS_Store
new file mode 100644
index 0000000..1d2574a
Binary files /dev/null and b/ddd-book/swarm-app/app/static/.DS_Store differ
diff --git a/ddd-book/swarm-app/app/static/css/.DS_Store b/ddd-book/swarm-app/app/static/css/.DS_Store
new file mode 100644
index 0000000..5008ddf
Binary files /dev/null and b/ddd-book/swarm-app/app/static/css/.DS_Store differ
diff --git a/ddd-book/swarm-app/app/static/css/main.css b/ddd-book/swarm-app/app/static/css/main.css
new file mode 100644
index 0000000..7fd8bc2
--- /dev/null
+++ b/ddd-book/swarm-app/app/static/css/main.css
@@ -0,0 +1,81 @@
+body {
+  margin: 0;
+  padding: 0;
+  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+  color: #444;
+}
+/*
+ * Formatting the header area
+ */
+header {
+  background-color: #48c1f5;
+  height: 35px;
+  width: 100%;
+  opacity: .9;
+  margin-bottom: 10px;
+}
+header h1.logo {
+  margin: 0;
+  font-size: 1.7em;
+  color: #fff;
+  text-align: center;
+}
+header h1.logo:hover {
+  color: #fff;
+  text-decoration: none;
+}
+/*
+ * Centering the body content
+ */
+.container {
+  width: 1200px;
+  margin: 0 auto;
+}
+div.home {
+  padding: 10px 0 30px 0;
+  background-color: #E6E6FA;
+  -webkit-border-radius: 6px;
+     -moz-border-radius: 6px;
+          border-radius: 6px;
+}
+div.about {
+  padding: 10px 0 30px 0;
+  background-color: #E6E6FA;
+  -webkit-border-radius: 6px;
+     -moz-border-radius: 6px;
+          border-radius: 6px;
+}
+h2 {
+  font-size: 3em;
+  margin-top: 40px;
+  text-align: center;
+  letter-spacing: -2px;
+}
+h3 {
+  font-size: 1.7em;
+  font-weight: 100;
+  margin-top: 30px;
+  text-align: center;
+  letter-spacing: -1px;
+  color: #999;
+}
+.menu {
+  float: right;
+  margin-top: 8px;
+}
+.menu li {
+  display: inline;
+}
+.menu li + li {
+  margin-left: 35px;
+}
+.menu li a {
+  color: #444;
+  text-decoration: none;
+}
+.center {
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+  width: 50%;
+}
\ No newline at end of file
diff --git a/ddd-book/swarm-app/app/static/images/.DS_Store b/ddd-book/swarm-app/app/static/images/.DS_Store
new file mode 100644
index 0000000..5008ddf
Binary files /dev/null and b/ddd-book/swarm-app/app/static/images/.DS_Store differ
diff --git a/ddd-book/swarm-app/app/static/images/bkp image.png b/ddd-book/swarm-app/app/static/images/bkp image.png
new file mode 100644
index 0000000..3c4113f
Binary files /dev/null and b/ddd-book/swarm-app/app/static/images/bkp image.png differ
diff --git a/ddd-book/swarm-app/app/static/images/image.png b/ddd-book/swarm-app/app/static/images/image.png
new file mode 100644
index 0000000..9a39855
Binary files /dev/null and b/ddd-book/swarm-app/app/static/images/image.png differ
diff --git a/ddd-book/swarm-app/app/templates/error.html b/ddd-book/swarm-app/app/templates/error.html
new file mode 100644
index 0000000..1d7761b
--- /dev/null
+++ b/ddd-book/swarm-app/app/templates/error.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Error page</title>
+</head>
+<body>
+    Throwing an error
+</body>
+</html>
diff --git a/ddd-book/swarm-app/app/templates/index.html b/ddd-book/swarm-app/app/templates/index.html
new file mode 100644
index 0000000..33b7186
--- /dev/null
+++ b/ddd-book/swarm-app/app/templates/index.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <meta charset="UTF-8">
+        <title>Docker FTW</title>
+        <link rel="stylesheet" href="{{ url_for('static', filename='css/main.css') }}">
+    </head>
+    <body>
+        <img src="/static/images/image.png" alt="NP logo" class="center">
+        <header>
+        <div class="container">
+            <h1 class="logo">Docker FTW</h1>
+        </div>
+        </header>
+    <div class="container">
+        <h2>Request served by <b>{{ hostname }}</b></h2>
+        <h3>You've refreshed <b>{{ count }}</b> times</h3>
+    </div>
+  </body>
+</html>
\ No newline at end of file
diff --git a/ddd-book/swarm-app/compose.yaml b/ddd-book/swarm-app/compose.yaml
new file mode 100644
index 0000000..09d6ec6
--- /dev/null
+++ b/ddd-book/swarm-app/compose.yaml
@@ -0,0 +1,42 @@
+# Un-comment the version field if you get an 'unsupported Compose file version: 1.0' ERROR
+
+#version: '3.8'
+networks:
+  counter-net:
+    driver: overlay
+    driver_opts:
+      encrypted: 'yes'
+volumes:
+  counter-vol:
+
+services:
+  web-fe:
+    image: nigelpoulton/ddd-book:swarm-app
+    command: python app.py
+    deploy:
+      replicas: 4
+      update_config:
+        parallelism: 2
+        delay: 10s
+        failure_action: rollback
+      placement:
+        constraints:
+          - 'node.role == worker'
+      restart_policy:
+        condition: on-failure
+        delay: 5s
+        max_attempts: 3
+        window: 120s
+    networks:
+      - counter-net
+    ports:
+      - published: 5001
+        target: 8080
+    volumes:
+      - type: volume
+        source: counter-vol
+        target: /app
+  redis:
+    image: "redis:alpine"
+    networks:
+      counter-net:
diff --git a/ddd-book/swarm-app/requirements.txt b/ddd-book/swarm-app/requirements.txt
new file mode 100644
index 0000000..770a967
--- /dev/null
+++ b/ddd-book/swarm-app/requirements.txt
@@ -0,0 +1,3 @@
+flask
+redis
+jinja2
\ No newline at end of file
diff --git a/ddd-book/web-app-0.2/.DS_Store b/ddd-book/web-app-0.2/.DS_Store
new file mode 100644
index 0000000..f28aa74
Binary files /dev/null and b/ddd-book/web-app-0.2/.DS_Store differ
diff --git a/ddd-book/web-app-0.2/Dockerfile b/ddd-book/web-app-0.2/Dockerfile
new file mode 100644
index 0000000..470c592
--- /dev/null
+++ b/ddd-book/web-app-0.2/Dockerfile
@@ -0,0 +1,19 @@
+# Test web-app to use with Pluralsight courses and Docker Deep Dive book
+FROM alpine
+
+LABEL maintainer="nigelpoulton@hotmail.com"
+
+# Install Node and NPM
+RUN apk add --update nodejs npm curl
+
+# Copy app to /src
+COPY . /src
+
+WORKDIR /src
+
+# Install dependencies
+RUN  npm install
+
+EXPOSE 8080
+
+ENTRYPOINT ["node", "./app.js"]
diff --git a/ddd-book/web-app-0.2/README.md b/ddd-book/web-app-0.2/README.md
new file mode 100644
index 0000000..01acf49
--- /dev/null
+++ b/ddd-book/web-app-0.2/README.md
@@ -0,0 +1,15 @@
+# Readme
+
+Used to build the `web0.2` tag with three books listed instead of 2.
+
+Exposes web server on port `8080` as per `./app.js`
+
+See `Dockerfile` for more details
+
+Referenced in:
+- [Docker Deep Dive book][1] 
+
+**The app is maintained approximately once per year so may contain vulnerbilities.**
+
+
+[1]:	https://www.amazon.com/Docker-Deep-Dive-Nigel-Poulton/dp/1521822808/ref=tmm_pap_swatch_0?_encoding=UTF8&qid=&sr=
\ No newline at end of file
diff --git a/ddd-book/web-app-0.2/app.js b/ddd-book/web-app-0.2/app.js
new file mode 100644
index 0000000..cb5b4e8
--- /dev/null
+++ b/ddd-book/web-app-0.2/app.js
@@ -0,0 +1,17 @@
+// Sample node.js web app for Pluralsight Docker CI course
+// For demonstration purposes only
+'use strict';
+
+var express = require('express'),
+    app = express();
+
+app.set('views', 'views');
+app.set('view engine', 'pug');
+
+app.get('/', function(req, res) {
+    res.render('home', {
+  });
+});
+
+app.listen(8080);
+module.exports.getApp = app;
diff --git a/ddd-book/web-app-0.2/package.json b/ddd-book/web-app-0.2/package.json
new file mode 100644
index 0000000..b2ff584
--- /dev/null
+++ b/ddd-book/web-app-0.2/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "container-web-test",
+  "private": true,
+  "version": "0.0.5",
+  "description": "Demo app for web container demonstrations",
+  "main": "app.js",
+  "author": "Nigel Poulton <nigelpoulton@hotmail.com> (https://nigelpoulton.com)",
+  "license": "May contain vulnerabilities!",
+  "dependencies": {
+    "express": "4.18.2",
+    "pug": "3.0.2",
+    "mocha": "10.2.0",
+    "supertest": "6.3.3"
+  }
+}
diff --git a/ddd-book/web-app-0.2/views/home.pug b/ddd-book/web-app-0.2/views/home.pug
new file mode 100644
index 0000000..877f86a
--- /dev/null
+++ b/ddd-book/web-app-0.2/views/home.pug
@@ -0,0 +1,18 @@
+html
+  head
+    title='Docker FTW'
+    link(rel='stylesheet', href='https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css')
+  body
+    div.container
+      div.jumbotron
+        h1 Hello Docker learners!!!
+        h2 New book: The KCNA Book
+        p
+          a.btn.btn-primary(href="https://www.amazon.com/Quick-Start-Kubernetes-Nigel-Poulton-ebook/dp/B08T21NW4Z/ref=sr_1_1?dchild=1&keywords=quick+start+kubernetes&qid=1625132469&sr=8-1" target="_blank") Quick Start Kubernetes
+
+          a.btn.btn-outline-primary(href="https://www.amazon.com/Kubernetes-Book-Version-November-2018-ebook/dp/B072TS9ZQZ/ref=sr_1_1?dchild=1&keywords=the+kubernetes+book&qid=1625132902&sr=8-1" target="_blank") The Kubernetes Book
+
+          a.btn.btn-primary(href="https://www.amazon.com/KCNA-Book-Kubernetes-Native-Associate/dp/1916585035/ref=sr_1_1?crid=2DWVNBALQCOZD&keywords=kcna+book&qid=1684705492&sprefix=kcna+bo%2Caps%2C336&sr=8-1" target="_blank") The KCNA Book
+
+        p
+        p Be careful. The last time I updated the packages in this app was May 2023.
\ No newline at end of file
diff --git a/ddd-book/web-app/.DS_Store b/ddd-book/web-app/.DS_Store
new file mode 100644
index 0000000..ff3c3e3
Binary files /dev/null and b/ddd-book/web-app/.DS_Store differ
diff --git a/ddd-book/web-app/Dockerfile b/ddd-book/web-app/Dockerfile
new file mode 100644
index 0000000..470c592
--- /dev/null
+++ b/ddd-book/web-app/Dockerfile
@@ -0,0 +1,19 @@
+# Test web-app to use with Pluralsight courses and Docker Deep Dive book
+FROM alpine
+
+LABEL maintainer="nigelpoulton@hotmail.com"
+
+# Install Node and NPM
+RUN apk add --update nodejs npm curl
+
+# Copy app to /src
+COPY . /src
+
+WORKDIR /src
+
+# Install dependencies
+RUN  npm install
+
+EXPOSE 8080
+
+ENTRYPOINT ["node", "./app.js"]
diff --git a/ddd-book/web-app/README.md b/ddd-book/web-app/README.md
new file mode 100644
index 0000000..6533b8b
--- /dev/null
+++ b/ddd-book/web-app/README.md
@@ -0,0 +1,13 @@
+# Simple web app for Docker Deep Dive book
+
+Exposes web server on port `8080` as per `./app.js`
+
+See `Dockerfile` for more details
+
+Referenced in:
+- [Docker Deep Dive][1] 
+
+**The app is maintained approximately once per year so may contain vulnerbilities.**
+
+
+[1]:	https://www.amazon.com/Docker-Deep-Dive-Nigel-Poulton/dp/1521822808/ref=tmm_pap_swatch_0?_encoding=UTF8&qid=&sr=
\ No newline at end of file
diff --git a/ddd-book/web-app/app.js b/ddd-book/web-app/app.js
new file mode 100644
index 0000000..cb5b4e8
--- /dev/null
+++ b/ddd-book/web-app/app.js
@@ -0,0 +1,17 @@
+// Sample node.js web app for Pluralsight Docker CI course
+// For demonstration purposes only
+'use strict';
+
+var express = require('express'),
+    app = express();
+
+app.set('views', 'views');
+app.set('view engine', 'pug');
+
+app.get('/', function(req, res) {
+    res.render('home', {
+  });
+});
+
+app.listen(8080);
+module.exports.getApp = app;
diff --git a/ddd-book/web-app/package.json b/ddd-book/web-app/package.json
new file mode 100644
index 0000000..b2ff584
--- /dev/null
+++ b/ddd-book/web-app/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "container-web-test",
+  "private": true,
+  "version": "0.0.5",
+  "description": "Demo app for web container demonstrations",
+  "main": "app.js",
+  "author": "Nigel Poulton <nigelpoulton@hotmail.com> (https://nigelpoulton.com)",
+  "license": "May contain vulnerabilities!",
+  "dependencies": {
+    "express": "4.18.2",
+    "pug": "3.0.2",
+    "mocha": "10.2.0",
+    "supertest": "6.3.3"
+  }
+}
diff --git a/ddd-book/web-app/views/home.pug b/ddd-book/web-app/views/home.pug
new file mode 100644
index 0000000..96ce3b2
--- /dev/null
+++ b/ddd-book/web-app/views/home.pug
@@ -0,0 +1,17 @@
+html
+  head
+    title='Docker FTW'
+    link(rel='stylesheet', href='https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css')
+  body
+    div.container
+      div.jumbotron
+        h1 Hello Docker learners!!!
+        h2 Check out my other books
+        p
+          a.btn.btn-primary(href="https://www.amazon.com/Quick-Start-Kubernetes-Nigel-Poulton-ebook/dp/B08T21NW4Z/ref=sr_1_1?dchild=1&keywords=quick+start+kubernetes&qid=1625132469&sr=8-1" target="_blank") Quick Start Kubernetes
+
+          a.btn.btn-outline-primary(href="https://www.amazon.com/Kubernetes-Book-Version-November-2018-ebook/dp/B072TS9ZQZ/ref=sr_1_1?dchild=1&keywords=the+kubernetes+book&qid=1625132902&sr=8-1" target="_blank") The Kubernetes Book          
+          
+        p
+        p Be careful. The last time I updated the packages in this app was May 2023.
+
diff --git a/useful_commands.md b/useful_commands.md
new file mode 100644
index 0000000..f278c7a
--- /dev/null
+++ b/useful_commands.md
@@ -0,0 +1,36 @@
+# Get containers list
+```
+docker ps -a
+```
+
+# Remove container by ID
+```
+docker rm <<container_id>>
+```
+
+# Run container with name
+```
+docker run --name some_name -ti ubuntu:latest /bin/bash
+```
+
+# Stop container
+```
+docker stop <<ID/name/...>>
+```
+
+# Inspect docker container stats
+```
+docker inspect <<ID/name/...>>
+```
+
+# Set restart policy to conatiner
+```
+docker run -d --restart (always|unless-stoppe|on-failure)
+```
+
+# Run container detached
+```
+docker run -d ...
+```
+`-d` flag instructs the container to run in detached mode
+
diff --git a/web_server/notes.md b/web_server/notes.md
new file mode 100644
index 0000000..e69de29