add dns server to embassy-os (#1572)

* add dns server to embassy-os

* fix initialization

* multiple ip addresses

backend/src/manager/mod.rs

@@ -293,6 +293,7 @@ async fn run_main(
         .net_controller
         .remove(
             &state.manifest.id,
+            ip,
             state.manifest.interfaces.0.keys().cloned(),
         )
         .await?;