p2pool-docker/.github/workflows/update-image-on-push.yml

name: "Update Image and Push to Github Packages and Docker Hub when Dockerfile is changed"
# Run this workflow every time a new commit pushed to your repository
on:
  push:
    paths:
    - 'Dockerfile'
jobs:
  rebuild-container:
    name: "Rebuild Container with the latest base image"
    runs-on: ubuntu-latest
    steps:
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1
      -
        name: Cache Docker layers
        uses: actions/cache@v2
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-
      -
        name: Login to GitHub Container Registry
        uses: docker/login-action@v1 
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}
      -
        name: Login to DockerHub
        uses: docker/login-action@v1 
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
      - name: "Checkout repository"
        uses: "actions/checkout@v2"
      - 
        name: "Get Monero Release Tag"
        id: get_tag
        run: echo "::set-output name=tag::$(awk -F "=" '/MONERO_BRANCH=/ {print $2}' Dockerfile)"
      -
        name: Build and push to Docker Hub and Github Packages Docker Registry
        id: docker_build
        uses: docker/build-push-action@v2
        with:
          push: true
          tags: |
            ghcr.io/sethsimmons/simple-monerod-docker/simple-monerod:latest
            ghcr.io/sethsimmons/simple-monerod-docker/simple-monerod:${{ steps.get_tag.outputs.tag }}
            sethsimmons/simple-monerod:latest
            sethsimmons/simple-monerod:${{ steps.get_tag.outputs.tag }}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache-new
      -
        # Temp fix
        # https://github.com/docker/build-push-action/issues/252
        # https://github.com/moby/buildkit/issues/1896
        name: Move cache
        run: |
          rm -rf /tmp/.buildx-cache
          mv /tmp/.buildx-cache-new /tmp/.buildx-cache
      -
        name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}