Hello, I am trying to use Websocket

export class Instances extends DurableObject {
  async fetch(request: Request): Promise<Response> {
    const webSocketPair = new WebSocketPair();
    const [client, server] = Object.values(webSocketPair);
    this.ctx.acceptWebSocket(server);

    return new Response(null, {
      status: 101,
      webSocket: client,
    });
  }
}