docker-compose.yml doesn't actually start inbox-api #1018

Running docker compose up doesn't bring the app container up. In fact, neither the Dockerfile or docker-compose.yml have a command to run.

Adding a command (bin/inbox-api.py) results in an import problem for the inbox module (because inbox isn't actually installed to the container's python):

Attaching to app-1
app-1  | Could not find 'inbox' Python package installation. Maybe the Vagrant box provisioning didn't succeed?
app-1  | Try running sudo ./setup.sh
app-1 exited with code 1