Update Readme to recommend bootstrapping by loading from structure.sql
Update Readme to recommend bootstrapping by loading from structure.sql

Running all the migrations is slow and brittle, so as advised in the
Rails Guides, we recommend bootstrapping with `rails db:setup`, which
loads the database schema from structure.sql. `rails db:test:prepare`
does the same for the test database.

galahq/gala,galahq/gala,galahq/gala,michigan-sustainability-cases/gala,michigan-sustainability-cases/gala,michigan-sustainability-cases/gala