Add docker-compose for dev environment

[chrisbull]

Init dev environment quicker with docker-compose, by just cloning the repo and then running yarn docker:up

Instead of having to do a prisma init {APP_NAME}, go through the setup, then copy the PRISMA_ENDPOINT, past the endpoint, then remove the new directory.

Docker compose instantly spins up the prisma server and postgres database, and then surfaces the localhost:4466 endpoint.

Everything else including yarn deploy:db works exactly the same. But now you are running locally on machine, instead of a remote prisma server.

[steida]

Wow. Thank you!