Deploy to the web

[osteele]

Deploy to Heroku:

• Create a Procfile and runtime.txt.
• The Procfile should list web, reset_db, and update_db. This match the three instructions described in the README.
• Create a Heroku app and a database. The code "should" work with PostGres, and should pick up DATABASE_URL and PORT. None of this has been tested.
• git push and test.

First implement #1. The app doesn't reveal FERPA or PII information, or anything that's not already discoverable, but it does make it more discoverable.