Use Bandit child spec directly

lib/bds/desktop/server.ex

@@ -1,17 +1,18 @@
 defmodule BDS.Desktop.Server do
   @moduledoc false
 
-  use GenServer
-
   def child_spec(opts) do
-    %{
-      id: __MODULE__,
-      start: {__MODULE__, :start_link, [opts]}
-    }
-  end
-
-  def start_link(opts) do
-    GenServer.start_link(__MODULE__, opts, name: __MODULE__)
+    Supervisor.child_spec(
+      {Bandit,
+       Keyword.merge(opts,
+         plug: BDS.Desktop.Endpoint,
+         scheme: :http,
+         ip: {127, 0, 0, 1},
+         port: port(),
+         startup_log: false
+       )},
+      id: __MODULE__
+    )
   end
 
   def url do
@@ -24,18 +25,4 @@ defmodule BDS.Desktop.Server do
       _other -> Application.get_env(:bds, :desktop)[:port] || 4010
     end
   end
-
-  @impl true
-  def init(_opts) do
-    {:ok, bandit_pid} =
-      Bandit.start_link(
-        plug: BDS.Desktop.Endpoint,
-        scheme: :http,
-        ip: {127, 0, 0, 1},
-        port: port(),
-        startup_log: false
-      )
-
-    {:ok, %{bandit_pid: bandit_pid}}
-  end
 end