build.yml

name: Build CI

on:
  push:
    branches: [ '*' ]
    tags: [ '*' ]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - name: Checkout git repository
      uses: actions/checkout@v2
    
    - name: Prepare docker image tags
      id: docker_meta
      uses: docker/metadata-action@v3
      with:
        images: ghcr.io/${{ github.repository }} 
        tags: |
          type=ref,event=branch
          type=ref,event=tag

    - name: Login to Github container registry
      uses: docker/login-action@v1
      with:
        registry: ghcr.io
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}

    - name: Build and push docker images
      id: docker_build
      uses: docker/build-push-action@v2
      with:
        context: .
        push: ${{ github.event_name != 'pull_request' }}
        tags: ${{ steps.docker_meta.outputs.tags }}
        labels: ${{ steps.docker_meta.outputs.labels }}
    
    - name: Image digest
      run: echo ${{ steps.docker_build.outputs.digest }}