AppRunner: Support Nodejs 24.0.2

Change-Id: I37659d91d8211d5cfb4240a885da5a51ef43774a
diff --git a/apps/app-runner/server.go b/apps/app-runner/server.go
index ef14842..83bcac4 100644
--- a/apps/app-runner/server.go
+++ b/apps/app-runner/server.go
@@ -60,7 +60,9 @@
 	http.HandleFunc("/update", s.handleUpdate)
 	http.HandleFunc("/ready", s.handleReady)
 	http.HandleFunc("/logs", s.handleLogs)
-	go s.pingManager()
+	if s.managerAddr != "" && s.appId != "" {
+		go s.pingManager()
+	}
 	if err := s.run(); err != nil {
 		return err
 	}