feat: switch to phoenix liveview

Co-authored-by: Copilot <copilot@github.com>

lib/bds/desktop/health_controller.ex

@@ -0,0 +1,9 @@
+defmodule BDS.Desktop.HealthController do
+  @moduledoc false
+
+  use Phoenix.Controller, formats: [:html]
+
+  def show(conn, _params) do
+    text(conn, "ok")
+  end
+end