docker-ddns-server/.github/workflows/containers.yml

---
name: 'build images'

on:
  push:
    tags:
    - '*'

jobs:
  docker:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Prepare
        id: prep
        run: |
          DOCKER_IMAGE=${{ secrets.DOCKER_USERNAME }}/${GITHUB_REPOSITORY#*/}
          VERSION=${GITHUB_REF/refs\/tags\//}
          SHORTREF=${GITHUB_SHA::8}
          TAGS="${DOCKER_IMAGE}:${VERSION},${DOCKER_IMAGE}:latest"          
      
          # Set output parameters
          echo ::set-output name=version::${VERSION}
          echo ::set-output name=tags::${TAGS}
          echo ::set-output name=docker_image::${DOCKER_IMAGE}
      - name: Get the version
        id: get_version
        run: echo ::set-output name=version::${GITHUB_REF/refs\/tags\//}     
      - name: Set up QEMU
        uses: docker/setup-qemu-action@master
        with:
          platforms: linux/amd64,linux/arm/v7,linux/arm64

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@master

      - name: Login to DockerHub
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Build
        uses: docker/build-push-action@v2
        with:
          builder: ${{ steps.buildx.outputs.name }}
          context: .
          file: ./deployment/Dockerfile
          platforms: linux/amd64,linux/arm64,linux/arm
          push: true
          tags: ${{ steps.prep.outputs.tags }}