Easier developer workflow

[ChrisPenner]

Overview

Retools the developer workflow via Make targets to make it easier to keep persistent data while still being able to run transcripts, etc.

• Update README

Implementation notes

• Splits up the docker compose into a couple layerable files
• Adds checks in bash functions for cleaning postgres so they ensure we're in a transcript database before cleaning
• make serve now resets postgres to use the fixtures DB before booting up share
• make transcripts now resets postgres to use a transcripts DB before running transcripts on it

Interesting/controversial decisions

This is turning into a bit of a rat's nest of bash at this point unfortunately, might be worth porting to python or a Haskell shell lib.

Test coverage

Existing transcripts

Loose ends

It'd be nice to be able to list projects and have them auto-loaded into local postgres, but that's a bit more work, this is a good first step.