How to create a webserver to make bot online 24 7 using uptime robot

First Code

const keepAlive = require('./alive.js');

Second code

keepAlive();

alive.js file code

const express = require('express');

const server = express();

server.all('/', (req, res)=>{
    res.send('Your bot is alive!')
})

function keepAlive(){
    server.listen(3000, ()=>{console.log("Server is Ready!")});
}

module.exports = keepAlive;