docker-build-debian.yml

# https://docs.github.com/en/actions/publishing-packages/publishing-docker-images
name: Docker build Debian image

on:
  release:
    types: [created]
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]
  schedule:
    # * is a special character in YAML so you have to quote this string
    # at 4 am
    - cron:  '0 4 * * *'

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  docker-build-debian:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Set up QEMU
        # https://github.com/docker/setup-qemu-action
        uses: docker/setup-qemu-action@v2

      - name: Set up Docker Buildx
        # https://github.com/docker/setup-buildx-action
        uses: docker/setup-buildx-action@v2

      - name: Log in to GH packages
        # https://github.com/docker/login-action
        uses: docker/login-action@v2
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        # https://github.com/docker/metadata-action
        uses: docker/metadata-action@v4
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          flavor: |
            latest=true
            prefix=
            suffix=-slim-bullseye

      - name: Build and push Docker image
        # https://github.com/docker/build-push-action
        uses: docker/build-push-action@v3
        with:
          context: .
          file: ./Dockerfile
#          platforms: linux/386, linux/amd64, linux/arm/v5, linux/arm/v7, linux/arm64/v8, linux/mips64le, linux/ppc64le, linux/s390x
          platforms: linux/386, linux/amd64, linux/arm/v5, linux/arm/v7, linux/arm64/v8
          push: ${{ github.event_name == 'release' && github.event.action == 'created' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}