Add categories

[esteban-gs]

In development, we seed the database with categories. We don't seed the staging database. We should think of a way to update the staging (and eventually production) categories. Possible approaches:

• Is it feasible to seed the staging database? Maybe we reset all the data in staging once in a while and start from a fresh seed. Then, we figure out production later.
• Maybe node script that lives in the backend that we can run against a staging db connection that creates/updates interests.

[esteban-gs]

Marking this as closed.