luckysheet-ot/packages/ot-demo/server.js

let express = require('express');
let socket = require('socket.io');
let http = require('http');

let app = express();
let io = socket(http.Server(app));

app.get('/', (request, response) => {
  response.sendFile(`${__dirname}/index.html`);
});

http.listen(3000, () => {
  console.log('listening on *:3000');
});

io.on('connection', (socket) => {

});