Github Workflow to build and push multiarch docker image

multiarch.yaml

name: Create and publish a multiarch Docker image

on:
  push:
    branches:
      - 'main'
      - 'issue**'
      - '**/issue**'

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  multiarch-build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    
    strategy:
      matrix:
        include:
          - dockerfile: Dockerfile
            platforms: |-
              linux/amd64
              linux/arm64
      fail-fast: true

    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v3.5.0
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=tag
            type=raw,value=r{{date 'YYYYMMDD'}}
      
      - name: Set up QEMU for multiarch builds
        uses: docker/setup-qemu-action@v1

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1

      - name: Log in to the Container registry
        uses: docker/login-action@v1.10.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v2
        with:
          context: .
          push: ${{ github.ref_name == 'main' }}
          file: ${{ matrix.dockerfile }}
          platforms: ${{ matrix.platforms }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}