Workflow to publish on DockerHub

publish_dockerhub.yml

name: Publish DockerHub

on:
  release:
    types: [published]
     
jobs:
  docker:
      runs-on: ubuntu-latest
      steps:
        - name: Checkout code
          uses: actions/checkout@v1

        - name: Get current version
          id: vars
          run: echo ::set-output name=version::$(cat setup.cfg | sed -n '2 p' | tail -c 6)
        - name: Test output
          run: echo ${{ steps.vars.outputs.version }}

        - name: Login to DockerHub
          uses: docker/login-action@v1
          with:
              username: ${{ secrets.DOCKER_HUB_USERNAME }}
              password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
        - name: Set up Docker Buildx
          id: buildx
          uses: docker/setup-buildx-action@v1
        - name: Build and push
          id: docker_build
          uses: docker/build-push-action@v2
          with:
            context: ./
            file: ./Dockerfile
            push: true
            tags: ${{ secrets.DOCKER_HUB_USERNAME }}/image:${{ steps.vars.outputs.version }}, ${{ secrets.DOCKER_HUB_USERNAME }}/image:latest
        - name: Image digest
          run: echo ${{ steps.docker_build.outputs.digest }}