The socket connection works on localhost but didn't work when uploaded on cpanel.

Server side code

const express = require('express');
const app = express()
const http = require('http').createServer(app);
const io = require('socket.io')(http, {'pingInterval': 10000, 'pingTimeout': 10000});
const bodyParser = require('body-parser');
const port = 3000 // i tried a rage of ports but non of them works

app.use(bodyParser.urlencoded({extended:true}));
app.use(bodyParser.json({extended: true,limit: '50mb'}));

io.on('connection', (socket) => {
    console.log(socket.id)
    io.emit('message', "hi");
});

app.get("/", (req, res) => {
    res.send("Get method called")
})

app.post("/", (req, res) => {
    res.send("Post method called")
})

http.listen(port, () => console.log("Listening on port: ",port))

(SERVER) Result on postman:

(Localhost) Result on postman:

I don't know what to do, I did try alot of ports but still no success.