Fixes for venv building & Docker, README additions & changes

[Denperidge]

• Fixed typed-ast building by bumping to latest
• Fixed Docker migrations
• README.md reformats and additons
  • Docker logging
  • Env variables
• Added example env to docker-compose, removed obsolete version key

This also fixes #75 !

[Denperidge]

Wanted to test on a remote deployment and a fresh container, and it seems to work!