docker-push.yml

name: Docker Build/Publish Image
on:
  push:    
    branches: [ main ]
jobs:   
  build:    
    runs-on: ubuntu-latest
    env:      
      DOCKER_REGISTRY: hub.docker.com
      DOCKER_IMAGE: RyanConnell/concert-watch
      DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
      DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
      DOCKER_TARGET_PLATFORM: linux/arm/v7
      
    steps:
    - name: Checkout the code
      uses: actions/checkout@v1
      
    - name: Set up Docker Buildx
      uses: crazy-max/ghaction-docker-buildx@v1
      with:
        version: latest
        
    - 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 }} \
        --tag ${{ steps.prepare.outputs.docker_image }}:${{ steps.prepare.outputs.version }} \
        --file ./Dockerfile \
        --output type=image,push=true .