message: Accept the environment variable PORT
diff: @@ -98,6 +98,10 @@ module.exports = function (environment) {
  cfg.defaults = defaults;
  + if (process.env.PORT) {
  + cfg.port = process.env.PORT;
  + }
  +
  if (process.env.MAPBOX_PUBLIC_KEY || !cfg.mapBoxKey) {
  cfg.mapBoxKey = process.env.MAPBOX_PUBLIC_KEY || "";
  }
  