Setup GithubActions Build & Test Process

[Nat1405]

Adrian recommended switching from TravisCI to GitHub Actions for my CI process. Since it seems like a great learning opportunity, I'll try it. The requirements of this build process are:

• Use the same build instructions as in ijiraq/gemini_processing/niri/dockerfiles/*. This acts as a consistent environment for running data reduction code.
• Install the latest push of code to the dev branch into the up-to-date docker container.
• Should be a short amount of time to build and start running pytests. Makes use of caching if necessary. "Quickly" here should be less than 10 minutes; preferably three minutes.
• Install required test data quickly and efficiently.

This is a new requirement for PR #6 .

[Nat1405]

I think the best way to do tests will be to pull/get the Docker container (it will happen to have niriPipe:dev installed on it), make this repo available in it and then run pytests on it, both via GitHub Actions. This is because we want to test code on each push, but the docker container needs to install code from a single particular branch within itself so it will be usable by batch and arcade.

[Nat1405]

All done (for now)! Closed in #6 .