name: buildx

on:
  pull_request:
    branches: master
  push:
    branches: master
    tags:

jobs:
  buildx:
    runs-on: ubuntu-latest
    steps:
      -
        name: Checkout
        uses: actions/checkout@v1
      -
        name: Set up Docker Buildx
        id: buildx
        uses: crazy-max/ghaction-docker-buildx@v1.1.0
      -
        name: Print builder available platforms
        run: echo ${{ steps.buildx.outputs.platforms }}
      -
        name: Run Buildx
        run: |
          docker buildx build \
            --platform linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64 \
            --output "type=image,push=false" \
            --file Dockerfile