setup-pg: Add heroku postgresql db
setup-pg: Move heroku plugin setup to global heroku setup script
Add local postgresql
setup: add bare 'npm install'
setup-coinbase
Ignore .env
start-local: using foreman
Add order processing from bitstarter-ssjs-db

This adds the order processing code as described in the homework
assignement, see [^466291].

[^466291]: 46629198ed2a564774fa3a1a9266723b07de2989 Minor formatting.
    (https://github.com/startup-class/bitstarter-ssjs-db.git)