Implement docker compose file that can spin up a working system

[schrockn]

It would be very useful to have a docker composer file to be able to easily spin up a local instance of Graphscale. This would require a mysql container, a redis container (once that is implemented), and a python sanic web app container. Code would also have to be changed in order for the containers to address themselves properly. Right now db passwords are hard-coded and the system assumes you are running everything on localhost.