acme.sh/.github/workflows/dockerhub.yml

name: Build DockerHub
on:
  push:
    branches: [ master, dev ]
    
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: checkout code
        uses: actions/checkout@v2
      - name: install buildx
        id: buildx
        uses: crazy-max/ghaction-docker-buildx@v1
        with:
          version: latest
      - name: login to docker hub
        run: |
          echo "${{ secrets.DOCKER_PASSWORD }}" | docker login -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin          
      - name: build and push the image (master branch)
        run: |
          docker buildx build \
            --push \
            --tag neilpang/acme.sh:latest \
            --platform linux/arm64/v8,linux/amd64,linux/arm/v6,linux/arm/v7,linux/386 .          
        if: ${{ github.ref == 'refs/heads/master' }}
      - name: build and push the image (dev branch)
        run: |
          docker buildx build \
            --push \
            --tag neilpang/acme.sh:dev \
            --platform linux/arm64/v8,linux/amd64,linux/arm/v6,linux/arm/v7,linux/386 .          
        if: ${{ github.ref == 'refs/heads/dev' }}