code: public Jogger listen(int port) {
  		this.port = port;
  
  		// configure the Jetty server
  		server = new Server(port);
  		server.setHandler(new JoggerHandler());
  
  		// start the Jetty server
  		try {
  			server.start();
  		} catch (Exception e) {
  			throw new RuntimeException(e);
  		}
  
  		return this;
  	}
docs: Starts the HTTP server listening in the specified <code>port</code>
  
  @param port the port in which the HTTP server will listen.
  
  @return itself for method chaining.