WIP: Docker development environment

[yozlet]

Still incomplete and failing, do not merge!

This is an initial attempt at a Docker-based development setup for Upcoming. It uses both docker and docker-compose, and should work out of the box with both Docker for Windows and Docker for Mac.

The aim: make getting started with Upcoming.org development much easier. Once you've checked out the repo and edited the config, just type this to get a working Upcoming install:

docker-compose up

It's based on https://github.com/BretFisher/node-docker-good-defaults so has built-in support for debugging and auto-reloading. I also pulled in some MySQL advice from this Medium post.

Todo:

• [X] Dockerize main app container
• [X] Link MySQL
  • [ ] Get latest schema (app currently fails due to lack of venue_gid table)
  • [ ] Work out whether MySQL data should live in its own volume
• [ ] Link Redis
• [ ] Work out whether to still do node node_modules/unicode/install.js
• [ ] Work out whether nodemon should be a devDep or be installed by the Dockerfile
• [ ] Code review from people who actually have good Docker + Node + MySQL experience
• [ ] Update docs

[yozlet]

@waxpancake: This is currently failing because models/event.js is looking for a venue_gid table that doesn't exist in the schema. Is db/schema.sql out of date?