I've written code and it's giving me errors.

const colyseus = require("colyseus");
const http = require("http");
const express = require("express");
const port = process.env.port || 3000;

const app = express();
app.use(express.json());

const demoServer = new colyseus.Server({
  server: http.createServer(app),
});

demoServer.listen(port);

Getting this error which i've provided below:

DEPRECATION WARNING: 'pingInterval', 'pingMaxRetries', 'server', and 'verifyClient' Server options will be permanently moved to WebSocketTransport on v0.15    
new Server({
      transport: new WebSocketTransport({
        pingInterval: ...,
        pingMaxRetries: ...,
        server: ...,
        verifyClient: ...
      })
    })