Deploy *entire* app on one server

[leesharma]

Right now we've got separate deployments of the client and server applications, which isn't ideal. It's such a small app that it should really be running on the same server. This relates to @progress-report/frontend too, but I think ops is under the backend umbrella for now.

Theoretically, there's a way to deploy two repos to one heroku instance:

• https://stackoverflow.com/questions/40282392/separate-frontend-and-backend-with-heroku

Otherwise, maybe DigitalOcean would be a better path?

Worst case, we could keep using two servers, but it means we're slowing the app down (and dealing with CORS stuff) for no good reason. It could make an okay stopgap solution though.