Hackathon Regions #106
Description
Currently, the code for determining the region of a hackathon is located in the front-end repo. Let's move this to the backend.
The Airtable contained an apac boolean, which was also migrated over this repo as a temporary solution. The new Hackathon::Region model should phase out the use of that boolean. (At the moment it's also exposed via the API to maintain existing functionality on the front end)