Improve CI and build system

[Brian Brunner]

Currently everything is half switched over to yarn workspaces.

Here's a handful of related small issues:

• Generic

  • make consistent format/lint/other scripts

• Frontend

  • Add ci tasks (probably just a build)

• Backend

  • ci is still using clojure directly. Use yarn instead for consistency

• DB

  • build doesn't do anything. Should prob build it's tag before backend builds.
  • run should run a dev image. Maybe add a sane config to backend too?