mancala/src/index.ts

import express, { Request, Response } from "express";
import * as http from 'http';
import WebSocket from "ws"

const app = express();

const server = http.createServer(app);

const ws = new WebSocket.Server({server})

ws.on("connection", (ws : WebSocket)=>{
    ws.on("message", (message : string)=>{
        console.log('received: %s', message);
        ws.send(`Hello, you sent -> ${message}`);
    })
    ws.send('Hi there, I am a WebSocket server');
})

app.get("/", (req: Request, res: Response) => {
  res.send("Hello World");
});

const port = process.env.PORT || 5000

server.listen(port, () => {
    console.log(`Server started on port ${port} :)`);
})