code: function live (liveOpts) {
      if (!started) {
        deferredLive = emitter.live.bind(null, liveOpts)
      } else {
        // destroy previous
        if (reloader) reloader.close()
  
        // pass some options for the server middleware
        server.setLiveOptions(xtend(liveOpts))
  
        // create a web socket server for live reload
        reloader = createReloadServer(server, opts)
      }
      return emitter
    }
docs: enables LiveReload capabilities