1st commit

.dockerignore

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+# Include any files or directories that you don't want to be copied to your
+# container here (e.g., local build artifacts, temporary files, etc.).
+#
+# For more help, visit the .dockerignore file reference guide at
+# https://docs.docker.com/engine/reference/builder/#dockerignore-file
+
+**/.DS_Store
+**/__pycache__
+**/.venv
+**/.classpath
+**/.dockerignore
+**/.env
+**/.git
+**/.gitignore
+**/.project
+**/.settings
+**/.toolstarget
+**/.vs
+**/.vscode
+**/*.*proj.user
+**/*.dbmdl
+**/*.jfm
+**/bin
+**/charts
+**/docker-compose*
+**/compose*
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/obj
+**/secrets.dev.yaml
+**/values.dev.yaml
+LICENSE
+README.md

.github/workflows/build.yaml

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+name: Branch を Push したらイメージをビルドする
+
+on:
+  push:
+    branches:
+      - '*'         # matches every branch that doesn't contain a '/'
+      - '*/*'       # matches every branch containing a single '/'
+      - '**'        # matches every branch
+      - '!main'     # excludes main
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-test-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      #- name: Set up QEMU
+      #  uses: docker/setup-qemu-action@v3
+      #- name: Set up Docker Buildx
+      #  uses: docker/setup-buildx-action@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build a image
+        id: push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: false
+          tags: ${{ steps.meta.outputs.tags }}
+          #platforms: linux/amd64,linux/arm64
+          labels: ${{ steps.meta.outputs.labels }}
+
+      - name: Start a container from the image
+        run: |
+          docker images
+          docker run -d --name test -p 9100:9100 ${{ steps.meta.outputs.tags }}
+          docker ps
+
+      - name: Test the container
+        run: |
+          sleep 5
+          docker ps
+          curl --silent --retry 3 --include  http://127.0.0.1:9100/ping | grep "200 OK" 
+          [ $? -ne 0 ] && (echo "error"; exit 1)
+          exit 0
+

.github/workflows/release.yaml

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+name: タグを付与してリリースすると、イメージを作成する
+
+on:
+  release:
+    types: [published]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        id: push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          platforms: linux/amd64,linux/arm64
+          labels: ${{ steps.meta.outputs.labels }}
+

Dockerfile

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+# syntax=docker/dockerfile:1
+FROM ubuntu:22.04
+
+# 依存するモジュールをインストール
+RUN apt-get update && apt-get install -y python3 python3-pip
+RUN pip install flask
+
+# アプリケーションのインストール
+RUN mkdir /app
+WORKDIR /app
+USER 65534:65534
+COPY --chown=65534:65534 app.py /app/app.py
+
+# コンテナの設定
+ENV FLASK_APP=app
+EXPOSE 9100
+CMD ["flask", "run", "--host", "0.0.0.0", "--port", "9100"]
+
+

README.md

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+
+## イメージのビルド
+
+~~~
+$ ls
+Dockerfile      README.md       app.py
+
+$ docker build -t ex1:1.0 .
+~~~
+
+## イメージの実行
+
+
+~~~
+docker run --name ex1 --publish 9100:9100 --detach ex1:1.0
+~~~
+
+## アクセス
+
+~~~
+curl http://localhost:9100/ping;echo
+~~~
+
+## コンテナへ入る
+
+~~~
+docker exec -it ex1 bash
+~~~
+
+## イメージをレジストリへ登録
+
+~~~
+export CR_PAT=YOUR_TOKEN
+export USERNAME=YOUR USERID 
+echo $CR_PAT | docker login ghcr.io -u $USERNAME --password-stdin
+docker tag ex1:1.0 ghcr.io/takara9/ex1:1.0
+docker push ghcr.io/takara9/ex1:1.0
+~~~
+
+## クリーンナップ
+
+~~~
+docker stop ex1
+docker rm ex1
+docker rmi ghcr.io/takara9/ex1:1.0
+docker rmi ex1:1.0
+~~~
+
+

app.py

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+from flask import Flask
+
+app = Flask(__name__)
+
+@app.route("/ping")
+def hello_world():
+    return "<p>pong</p>"