on: [push]
jobs:
  test-docker:
    runs-on: docker
    steps:
      - run: echo Docker works!
  test-dind:
    runs-on: dind
    steps:
      - run: docker run hello-world
      - run: echo ${{ github.ref_name }}
      -
        name: test
        if: contains(github.ref_name, 'a')
        run: echo works
      -
        name: test inverse
        if: ! contains(github.ref_name, 'a')
        run: echo works as well