---
name: 'build images'
# See https://itnext.io/building-multi-cpu-architecture-docker-images-for-arm-and-x86-3-building-in-github-action-ci-a382feab5af9

on:
  push:
    branches:
      - master

jobs:
  build-docker-images:
    name: Build Docker Images
    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 GitHub Package Registry
        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
      - name: Build & Push Docker image
        run: docker buildx build -t ghcr.io/${{ github.repository_owner }}/myimage:${GITHUB_SHA} -f [path to Dockerfile] --push --platform=linux/arm64,linux/amd64 [path to build context]