Initial draft of workflow
Initial draft of workflow

Derived from
  - travis.yml
    - /script/travis_setup
  - Building a Rails CI pipeline with GitHub Actions https://bit.ly/3BRTq5n

MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer