In which file i have to put inviteServiceUrl

Q1>>
Aim = build a website which has all the features like whatsapp in phone
installed package = i have installed jitsi-meet debain package in ubuntu locally. i am also using IFrame API.
my question is where to put inviteServiceUrl.
/etc/jitsi/meet/127.0.0.1-config.js
or
/usr/share/jitsi-meet-web-config/config.js. i have tried putting at this /etc/jitsi/meet/127.0.0.1-config.js location . but unable to achieve.
Q2>>
//server.js file code
const http = require(‘http’);

http.createServer((request, response) => {
const { headers, method, url } = request;
let body = ;
request.on(‘error’, (err) => {
console.error(err);
}).on(‘data’, (chunk) => {
body.push(chunk);
}).on(‘end’, () => {
body = Buffer.concat(body).toString();
// BEGINNING OF NEW STUFF

response.on('error', (err) => {
  console.error(err);
});

response.statusCode = 200;
response.setHeader('Content-Type', 'application/json');
// Note: the 2 lines above could be replaced with this next one:
// response.writeHead(200, {'Content-Type': 'application/json'})

const responseBody = { headers, method, url, body };

response.write(JSON.stringify(responseBody));
response.end();
// Note: the 2 lines above could be replaced with this next one:
// response.end(JSON.stringify(responseBody))

// END OF NEW STUFF

});
}).listen(8081);
command to run the file
node /server.js
i open a html file in chrome .
then i run the following command in console
const domain = ‘127.0.0.1’;
const options = {
roomName: ‘JitsiMeetAPIExample’,
width: ‘100%’,
height: 600,
parentNode: document.querySelector(’.mainContainer’), configOverwrite:{inviteServiceUrl:‘http://localhost:8080’}
};
const api = new JitsiMeetExternalAPI(domain,options);
api.invite([{‘id’:‘xyz’},{‘id’:‘xyz1’}]).then(s=>{console.log(s)},f=>{console.log(f)});
i am unable to hit at http://localhost:8080 , also i am not getting any error why ??

hello @damencho or @saghul or any guys , can u give hint/answer.