code: func (c *Client) StartServer() {
  	mux := http.NewServeMux()
  	mux.Handle("/", c)
  	log.Printf("Listening on http://%v...\n", c.BindAddress)
  	if err := http.ListenAndServe(c.BindAddress, mux); err != nil {
  		log.Fatal(err)
  	}
  }
docs: // StartServer starts a webserver listening for incoming mattermost POSTS.