name: Build container images

on:
  push:
    branches:
    - master

jobs:
  build:
    runs-on: ubuntu-latest
    container:
      image: catthehacker/ubuntu:act-latest
    steps:
    - name: Check out the repo
      uses: actions/checkout@v3

    - name: Set up QEMU
      uses: docker/setup-qemu-action@v2

    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v2

    - name: Build
      uses: docker/build-push-action@v4
      env:
        # see <https://docs.gitea.com/usage/actions/comparison#dockerbuild-push-actionv4>
        ACTIONS_RUNTIME_TOKEN: ''
      with:
        context: .
        push: false
        platforms: |
          linux/amd64
          linux/arm64
        build_args: |
          PYTHON_VERSION=3
          ALPINE_VERSION=3.18
          ROTATE_BACKUPS_VERSION=8.1