gickup/.github/workflows/docker.yml

name: Build and Publish

on:
  # run it on push to the default repository branch
  push:
    tags:
      - "v*.*.*"
  # run it during pull request
  pull_request:

jobs:
  # define job to build and publish docker image
  build-and-push-docker-image:
    name: Build Docker image and push to repositories
    # run only when code is compiling and tests are passing
    runs-on: ubuntu-latest

    # steps to perform in job
    steps:
      - name: Checkout code
        uses: actions/checkout@v2

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v3
        with:
          # list of Docker images to use as base name for tags
          images: |
            buddyspencer/gickup
            ghcr.io/${{ github.actor }}/gickup            
          # generate Docker tags based on the following events/attributes
          tags: |
            type=schedule
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=sha
            type=raw,value=latest            
      # setup Docker buld action
      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v1

      - name: Login to DockerHub
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Login to Github Packages
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GHCR_PAT }}
      
      - name: Build image and push to Docker Hub and GitHub Container Registry
        uses: docker/build-push-action@v2
        with:
          # relative path to the place where source code with Dockerfile is located
          context: .
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          # build on feature branches, push only on main branch
          push: ${{ github.event_name != 'pull_request' }}
          platforms: linux/amd64, linux/arm64/v8, linux/arm/v7, linux/arm/v6

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