build_docker_image.yaml

name: Build and Push Docker image

on:
  push:
    branches: [ main ]
    # only build when important files change
    paths:
      - 'app/**'
      - 'Dockerfile'
      - '.github/workflows/build_docker_image.yaml'
  pull_request:
    branches: [ main ]

jobs:
  build:
    runs-on: ubuntu-latest

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

    -
      # we need qemu and buildx so we can build multiple platforms later
      name: Set up QEMU
      id: qemu
      uses: docker/setup-qemu-action@v2
      
    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v2


    - name: read tags
      run: |
        echo "VERSION=$(cat app/version.txt)" >> $GITHUB_ENV

    - name: debug
      run: |
        echo  "TEST ${{ secrets.DOCKERHUB_USERNAME }} ${{ secrets.DOCKERHUB_TOKEN }} credentials"
        echo "VERSION=${{ env.VERSION }}"


    - name: Login to DockerHub XXXX
      uses: docker/login-action@v3
      with:
        username: ${{ secrets.DOCKERHUB_USERNAME }}
        password: ${{ secrets.DOCKERHUB_TOKEN }}


    -
      name: Docker meta
      id: docker_meta
      uses: docker/metadata-action@v4
      with:
        # list of Docker images to use as base name for tags
        images: alexobunnyshell/example-github-actions
        # flavor: latest=false
        # tags: ${{ inputs.tag-rules }}
        tags: |
          latest
          ${{ env.VERSION }}
    
    
    # - name: Build and push
    #   uses: docker/build-push-action@v2
    #   with:
    #     context: .
    #     file: ./Dockerfile
    #     push: true
    #     tags: alexobunnyshell/example-github-actions:0.0.1

    -
        name: Docker Build and Push
        id: build_image
        uses: docker/build-push-action@v3
        with:
          platforms: ${{ inputs.platforms }}
          context: .
          file: ./Dockerfile
          builder: ${{ steps.buildx.outputs.name }}
          # it uses github cache API for faster builds:
          # https://github.com/docker/build-push-action/blob/master/docs/advanced/cache.md#cache-backend-api
          cache-from: type=gha
          cache-to: type=gha,mode=max
          push: true
          tags: ${{ steps.docker_meta.outputs.tags }}
          labels: ${{ steps.docker_meta.outputs.labels }}