add presentation

.devcontainer/devcontainer.json

@@ -6,12 +6,24 @@
 	"image": "mcr.microsoft.com/devcontainers/base:jammy",
 	"features": {
 		"ghcr.io/devcontainers/features/docker-in-docker:2": {},
-		"ghcr.io/devcontainers-contrib/features/doctoolchain-sdkman:2": {}
+		"ghcr.io/devcontainers-contrib/features/doctoolchain-sdkman:2": {
+			"version" : "3.1.2",
+			"jdkVersion": "17"
+		},
+		"ghcr.io/devcontainers-contrib/features/http-server:1": {}
 	},
+	"postCreateCommand": "curl -Lo dtcw https://doctoolchain.org/dtcw && chmod +x dtcw",
 	"remoteUser": "vscode",
 	"workspaceMount": "source=${localWorkspaceFolder},target=/workspace,type=bind,Z",
 	"workspaceFolder": "/workspace",
 	
 	"runArgs": ["--userns=keep-id"],
-	"containerUser": "vscode"
+	"containerUser": "vscode",
+	"customizations": {
+		"vscode": {
+			"extensions": [
+				"asciidoctor.asciidoctor-vscode"
+			]
+		}
+	}
 }

.dockerignore

@@ -1,4 +1,8 @@
 .devcontainer
 .git
 .docker-files
-.dockerignore
+.dockerignore
+.gradle
+.slides
+.build
+dtcw

.gitignore

@@ -0,0 +1,3 @@
+dtcw
+.gradle
+.build

.slides/openspacet-2312.adoc

@@ -0,0 +1,173 @@
+= Docker Build Optimization
+:source-highlighter: highlightjs
+
+== Why Optimize Docker Builds?
+
+* Faster build times
+* Reduced image size
+
+== Optimization Strategies
+
+* Reordering
+* Combining
+* Mounting and local Cache
+* Multi-stage builds
+* Choose of base image
+* Clean docker build context
+* Remote Caching
+
+== Demo
+
+=== Base Image
+
+[source,docker]
+----
+include::../.docker-files/0-origin.Dockerfile[]
+----
+
+[.notes]
+--
+---
+docker build -f .docker-files/0-origin.Dockerfile -t demo/base .
+docker build -f .docker-files/0-origin.Dockerfile -t demo/base .
+touch foo
+docker build -f .docker-files/0-origin.Dockerfile -t demo/base .
+dive demo/base
+--
+
+=== Reordering
+
+[source,docker]
+----
+include::../.docker-files/1-reordering.Dockerfile[]
+----
+
+[.notes]
+--
+* reduce build time by layer cache
+
+docker build -f .docker-files/1-reordering.Dockerfile -t demo/reorder .
+docker build -f .docker-files/1-reordering.Dockerfile -t demo/reorder .
+touch bar
+docker build -f .docker-files/1-reordering.Dockerfile -t demo/reorder .
+dive demo/reorder
+--
+
+=== Combining
+
+[source,docker]
+----
+include::../.docker-files/2-combining.Dockerfile[]
+----
+
+[.notes]
+--
+* reduce layer numbers
+
+docker build -f .docker-files/2-combining.Dockerfile -t demo/combine .
+dive demo/combine
+--
+
+
+=== Mounting and local Cache
+
+[source,docker]
+----
+include::../.docker-files/3-mounting.Dockerfile[]
+----
+
+[.notes]
+--
+docker build -f .docker-files/3-mounting.Dockerfile -t demo/mounts .
+
+* extend intall package list
+
+docker build -f .docker-files/3-mounting.Dockerfile -t demo/mounts-2 .
+dive demo/mounts
+--
+
+=== Multi-stage builds
+
+[source,docker]
+----
+include::../.docker-files/4-multi-stage.Dockerfile[]
+----
+
+[.notes]
+--
+* remove all not needed files
+
+docker build -f .docker-files/4-multi-stage.Dockerfile -t demo/multistage .
+dive demo/multistage
+--
+
+=== Choose of base image
+
+[source,docker]
+----
+include::../.docker-files/5-base-image.Dockerfile[]
+----
+
+[.notes]
+--
+docker build -f .docker-files/5-base-image.Dockerfile -t demo/alpine .
+dive demo/alpine
+--
+=== Using pinned image
+
+[source,docker]
+----
+include::../.docker-files/6-pinimage.Dockerfile[]
+----
+
+== Clean docker build context
+
+* The `.dockerignore` file excludes unnecessary files from the build context
+
+[source,plaintext]
+```
+.git
+.gitignore
+.dockerignore
+*.log
+tmp/*
+```
+
+== Remote Caching
+
+* other build driver like https://docs.docker.com/build/drivers/[`docker-container`^] supports cache export
+
+[source,shell]
+----
+docker buildx build \ 
+    --cache-from myapp:cache \
+    --cache-to myapp:cache \
+    -t myapp:latest \
+    .
+----
+
+* Kaniko is a tool to build container images from a Dockerfile, inside a container or Kubernetes cluster.
+
+[source,shell]
+----
+kaniko build --cache=true -f Dockerfile.
+----
+
+[.notes]
+--
+* It's designed to work without Docker daemon
+* making it suitable for environments with restricted access.
+--
+
+
+== Resources
+
+* Docker Documentation: https://docs.docker.com/
+* Docker Build Best Practices: 
+** https://docs.docker.com/develop/develop-images/dockerfile_best-practices/
+** https://docs.docker.com/build/cache/
+* .dockerignore Documentation: https://docs.docker.com/engine/reference/builder/#dockerignore-file
+* Remote Caching with Buildx: https://docs.docker.com/build/cache/backends/
+* Kaniko GitHub Repository: https://github.com/GoogleContainerTools/kaniko
+* Alpine Linux: https://alpinelinux.org/
+* Dive - A tool for exploring each layer in a Docker image: https://github.com/wagoodman/dive

docToolchainConfig.groovy

@@ -0,0 +1,10 @@
+// Path where docToolchain creates its artifacts.
+outputPath = '.build'
+
+// Path where the docToolchain will search for the input files.
+inputPath = '.slides';
+
+// Define which formats should be processed.
+inputFiles = [
+    [file: 'openspacet-2312.adoc', formats: ['revealjs']],
+]