dockerimage.yml

name: Docker Build/Publish Image 
on:  
  # schedule:
  #   # * is a special character in YAML so you have to quote this string
  #   - cron:  '30 5,17 * * *'
  push:    
    branches: [ master ]  
jobs:   
  build:    
    runs-on: ubuntu-latest   
    env:      
      DOCKER_REGISTRY: registry.hub.docker.com      
      DOCKER_IMAGE: briancarnold/spotmybackup      
      DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
      DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}  
      DOCKER_TARGET_PLATFORM: linux/arm64,linux/amd64
    steps:    
    - name: Checkout the code       
      uses: actions/checkout@v1 
    - name: Set up QEMU
      uses: docker/setup-qemu-action@v1   
    - name: Set up Docker Buildx      
      uses: docker/setup-buildx-action@v1
    - name: Prepare      
      if: success()      
      id: prepare      
      run: |        
        echo ::set-output name=docker_platform::${DOCKER_TARGET_PLATFORM}
        echo ::set-output name=docker_image::${DOCKER_REGISTRY}/${DOCKER_IMAGE}
        echo ::set-output name=version::${GITHUB_RUN_NUMBER}
    - name: Docker Login      
      if: success()      
      run: |        
        echo "${DOCKER_PASSWORD}" | docker login ${DOCKER_REGISTRY} --username "${DOCKER_USERNAME}" --password-stdin          
    - name: Run Buildx (push image)      
      if: success()      
      run: |        
        docker buildx build --platform ${{ steps.prepare.outputs.docker_platform }} -t ${{ steps.prepare.outputs.docker_image }}:${{ steps.prepare.outputs.version }} -t ${{ steps.prepare.outputs.docker_image }}:latest . --push