Add a single debug log for troubleshooting

lib/servers/generic.ex

@@ -46,6 +46,7 @@ defmodule Amethyst.Server do
   @moduledoc """
   This module includes shared boilerplate code for all stages of the server.
   """
+require Logger
 
   defmacro __using__(_opts) do
     quote do
@@ -63,6 +64,7 @@ defmodule Amethyst.Server do
         Logger.debug("Transmitting #{inspect(packet)}")
         data = serialize(packet)
         length = byte_size(data) |> Amethyst.Minecraft.Write.varint()
+        Logger.debug("Sending #{inspect(length <> data)}")
         :gen_tcp.send(client, length <> data)
       end
     end