Discourse API developers docker-compose basic image

[Falco]

@alank

I do docker-compose up and db, redis, discourse, sidekick etc comes up, and I can hit Discourse on port x, register a user etc. and get an email (using mailcatcher).

In the linked setup, you do a ./bin/docker/unicorn and a rails server, redis, postgresql, sidekiq come up, and you can hit your local copy of Discourse with API requests.