feat: first take at UI app

lib/bds/desktop/server.ex

@@ -0,0 +1,38 @@
+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__)
+  end
+
+  def url do
+    BDS.Desktop.url(port())
+  end
+
+  def port do
+    Application.get_env(:bds, :desktop)[:port] || 4010
+  end
+
+  @impl true
+  def init(_opts) do
+    {:ok, bandit_pid} =
+      Bandit.start_link(
+        plug: BDS.Desktop.Router,
+        scheme: :http,
+        ip: {127, 0, 0, 1},
+        port: port(),
+        startup_log: false
+      )
+
+    {:ok, %{bandit_pid: bandit_pid}}
+  end
+end