name: publish
on:
  release:
    types: [published]
jobs:
  build:
    name: Publish
    runs-on: ubuntu-latest
    steps:
      - name: Check out code
        uses: actions/checkout@v2
      - name: Get image repository
        run: echo IMAGE_REPOSITORY=$(echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
      - name: Get the release
        run: echo RELEASE=${GITHUB_REF/refs\/tags\//} >> $GITHUB_ENV
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1
      - name: Login to Docker Registry
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
      - name: Build and push docker image
        uses: docker/build-push-action@v2
        with:
          platforms: linux/amd64,linux/arm/v7,linux/arm64
          pull: true
          push: true
          tags: |
            ${{ env.IMAGE_REPOSITORY }}:${{ env.RELEASE }}
