Log server port

Change-Id: Ifaf7b24675d518bf3acd117b0234cfaf11fd9280
diff --git a/service.go b/service.go
index 687c16a..e48ad11 100644
--- a/service.go
+++ b/service.go
@@ -238,5 +238,7 @@
 		port = "5722"
 	}
 
+	log.Println("Starting server on port " + port)
+
 	log.Fatal(http.ListenAndServe(":"+port, r))
 }