Using "item" instead of "data" as name for the JSON object when rendering a single item.

lib/generic_rest_server_web/controllers/item_json.ex

@@ -12,7 +12,7 @@ defmodule GenericRestServerWeb.ItemJSON do
   Renders a single item.
   """
   def show(%{item: item}) do
-    %{data: data(item)}
+    %{item: data(item)}
   end
 
   defp data(%Item{} = item) do