cert-manager-webhook-example/.github/workflows/push.yml

---
on:
  release:
    types:
      - created

jobs:
  multi-arch-build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1
      - name: Login to DockerHub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - name: Prepare release tag
        id: tag
        run: echo ::set-output name=version::${GITHUB_REF#refs/tags/v}
      - name: Build and push
        uses: docker/build-push-action@v2
        with:
          context: .
          file: ./Dockerfile
          platforms: linux/amd64
          push: true
          tags: |
            containeroo/cert-manager-webhook-bluecat:latest
            containeroo/cert-manager-webhook-bluecat:${{ steps.tag.outputs.version }}