GH 2117 - Setup ecephys_etl_pipelines Repo

[Matyasz]

• [x] Create repo
• [x] Setup GitHub Actions
• [x] Setup Docker repository

[Matyasz]

Here is a list of other work to be done, as gathered from the ophys_etl_pipelines repo:

• [x] Write the Dockerfile
• [ ] Setup codecov
• [ ] Setup deployment