container_build_and_push.yml

# https://docs.github.com/en/actions/publishing-packages/publishing-docker-images#publishing-images-to-docker-hub-and-github-packages
name: Publish Container image

on:
  push:
    tags:
      - 'v*'
    paths:
      - '**Containerfile**'
  workflow_dispatch:

jobs:
  push_to_registries:
    name: Push Container image to multiple registries
    runs-on: ubuntu-latest

    steps:
      - name: Get repository basename
        id: repo-basename
        run: |
          echo "value=`basename ${{ github.repository }}`" >> $GITHUB_OUTPUT
        shell: bash

      - name: Check out the repo
        uses: actions/checkout@v3

      - name: Log in to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_HUB_USERNAME }}
          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            ${{ secrets.DOCKER_HUB_USERNAME }}/${{ steps.repo-basename.outputs.value }}
            ghcr.io/${{ github.repository }}

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3
        with:
          platforms: linux/amd64,linux/arm64,linux/arm/8,linux/arm/7,linux/arm/6

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v3

      - name: Available platforms
        run: echo ${{ steps.buildx.outputs.platforms }}

      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v5
        with:
          platforms: linux/amd64,linux/arm64,linux/arm/8,linux/arm/7,linux/arm/6
          context: .
          file: Containerfile
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}

      - name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}