devdocs/.github/workflows/docker-build.yml

name: Build and Push Docker Images
on:
  schedule:
    - cron: '0 0 1 * *'  # Run monthly on the 1st
  workflow_dispatch:  # Allow manual triggers
env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}
jobs:
  build-and-push:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    strategy:
      matrix:
        variant:
          - name: regular
            file: Dockerfile
            suffix: ''
          - name: alpine
            file: Dockerfile-alpine
            suffix: '-alpine'

    steps:
      - name: Checkout repository
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
        with:
          persist-credentials: false

      - name: Log in to the Container registry
        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata for Docker
        id: meta
        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 # v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=latest${{ matrix.variant.suffix }}
            type=raw,value={{date 'YYYYMMDD'}}${{ matrix.variant.suffix }}

      - name: Build and push image
        uses: docker/build-push-action@ca052bb54ab0790a636c9b5f226502c73d547a25 # v5
        with:
          context: .
          file: ./${{ matrix.variant.file }}
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}