prevent data leakage when sending server.data

lib/servers.js

@@ -303,6 +303,16 @@ class ServerRegistration {
       message: message
     }
   }
+
+  getPublicData () {
+    // Return a custom object instead of data directly to avoid data leakage
+    return {
+      name: this.data.name,
+      ip: this.data.ip,
+      type: this.data.type,
+      color: this.data.color
+    }
+  }
 }
 
 module.exports = ServerRegistration