Y-webrtc signal server on ec2, cannot connect

1

Dear People,
I am trying to deploy my yjs project on aws. I put my react file on s3 and signal server on ec2.
I found out that webRtcProvider cannot connect to websocket signaling server.

This is my frontend code

export const doc = new Y.Doc();

export const provider = new WebrtcProvider(roomId, doc, {
  signaling: ["ws://54.180.118.157:4444"],
  awareness: new awarenessProtocol.Awareness(doc),
  maxConns: 4,
  filterBcConns: true,
  peerOpts: {},
});

I copy and paste this below server code from :
https://github.com/yjs/y-webrtc/blob/master/bin/server.js

#!/usr/bin/env node

import ws from 'ws'
import http from 'http'
import * as map from 'lib0/map'

const wsReadyStateConnecting = 0
const wsReadyStateOpen = 1
const wsReadyStateClosing = 2 // eslint-disable-line
const wsReadyStateClosed = 3 // eslint-disable-line

const pingTimeout = 30000

const port = process.env.PORT || 4444
// @ts-ignore
const wss = new ws.Server({ noServer: true })

const server = http.createServer((request, response) => {
  response.writeHead(200, { 'Content-Type': 'text/plain' })
  response.end('okay')
})

/**
 * Map froms topic-name to set of subscribed clients.
 * @type {Map<string, Set<any>>}
 */
const topics = new Map()

/**
 * @param {any} conn
 * @param {object} message
 */
const send = (conn, message) => {
  if (conn.readyState !== wsReadyStateConnecting && conn.readyState !== wsReadyStateOpen) {
    conn.close()
  }
  try {
    conn.send(JSON.stringify(message))
  } catch (e) {
    conn.close()
  }
}

Can i get help how to deploy my project on aws. I read all the thread from this community but couldn’t find the related solution.
Thank you for helping in advance.