How to run NodeJs SocketIO on server (Centos 7)

I create app with nodejs socket io. It works clearly at localhost (port: 3000). But when i deploy it to my server in there i can run my app on 3000 port but client side throw timeout. How can i solve it?

var fs = require('fs');

var https = require('https');
var options = {
  key: fs.readFileSync('ssl.my-key.key'),
  cert: fs.readFileSync('ssl.my-cert.crt')
};
var server = https.createServer(options);
var io  = require('socket.io').listen(server);
var port = 3000;

const database = require('./Database');

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

  socket.on('message', async (msg) => {
    // I do some action here.
  });

  socket.on('disconnect', (msg) => {
    // some action in here too
  });

});

server.listen(port, () => {
  console.log('listening on *:' + port);
});