add peerWs to app

src/instance.ts

@@ -41,6 +41,8 @@ export const createInstance = ({ app, server, options }: {
     realm,
     config: customConfig
   });
+  
+  app.peerWs = wss;
 
   wss.on("connection", (client: IClient) => {
     const messageQueue = realm.getMessageQueueById(client.getId());
@@ -72,4 +74,4 @@ export const createInstance = ({ app, server, options }: {
 
   messagesExpire.startMessagesExpiration();
   checkBrokenConnections.start();
-};
+};