Metro

Metro aims for sub-second reload cycles, fast startup and quick bundling speeds. Works with thousands of modules in a single application. Supports every React Native project out of the box. Instead of creating the full server, create a Connect middleware that answers to bundle requests. This middleware can then be plugged into your own servers. The port parameter is optional and only used for logging purposes. The onBundleBuilt function is optional, is passed the bundle name, and is called when the server has finished creating the bundle. Starts a full Metro HTTP server. It will listen on the specified host port, and can then be queried to retrieve bundles for various entry points. If the secureServerOptions family of options are present, the server will be exposed over HTTPS.