message: Allows Heroku to open the PORT it wants
diff: @@ -8,9 +8,10 @@ global.Promise = require('bluebird');
  const throng = require('throng');
  const express = require('express');
  -const { PORT } = require('./config.coffee');
  +const CONFIG = require('./config.coffee');
  const WORKERS = process.env.WEB_CONCURRENCY || 1;
  +const PORT = process.env.PORT || CONFIG.PORT;
  const setup = require('./lib/setup.coffee');
  const cache = require('./lib/cache.coffee');
  