Let's use the geoconfig endpoint added in bikehopper/bikehopper-web-app#21 to fetch all the information currently hardcoded in src/lib/region/

Since this has two downsides:

1. Not able to localize the text via our existing translation system
2. Slightly slows down app load with an additional API request on the critical path

We can optionally have a Bay Area override of some of the information remain hardcoded, while still serving the purpose of making it easier to set up an instance in a new region.

For an example geoconfig, request https://bikehopper.org/api/v1/config