Add linting config

[rbdr/forum] / docker-compose.yml

version: '3'

services:
  forum:
    build: .
    env_file: .env
    image: rbdr/forum
    volumes:
      - .:/app
    environment:
      - FORUM_RETHINK_DB_HOST=db
    ports:
      - "1978:1978"
    links:
      - db
  db:
    image: rethinkdb:2.3.7
    ports:
      - "8080:8080"