static void Main(string[] args)
        {
            Grpc.Core.Server server = new Grpc.Core.Server
            {
                Services = { Waiter.BindService(new WaiterImpl()) },
                Ports    = { new ServerPort("localhost", Port, ServerCredentials.Insecure) }
            };
            server.Start();

            Console.WriteLine("Kitchen server listening on port " + Port);
            Console.WriteLine("Press any key to stop the server...");
            Console.ReadKey();

            server.ShutdownAsync().Wait();
        }