Running NodeJS App with Socket IO on Shared CPanel server Unexpected token - node.js

Question

I created a very simple socket IO app which receives a message and posts it back in a socket group.
The app is running successfully on my Windows machine with Node.js v12.14.0. But I want to get rid of my port forwarding so asked my hoster if it was possible to run the Node.js app on Cpanel. They were not a fan, but opened it up.
I had to install the dependencies manually but finally got no more dependency error while starting the app, but ended up with the error below. After doing some google-ing it probably has to do with the Node.js version on the server which is v6.16.0 . The hoster says they can't get this updated as it comes with cpanel. Now I was hoping there is a way to get my app.js running on this version.
Error:
enter code here[username#server app]$ node /home/username/domains/website.nl/app/app.js
/home/username/domains/website.nl/app/node_modules/ws/lib/websocket.js:347
...options
^^^
SyntaxError: Unexpected token ...
at createScript (vm.js:56:10)
at Object.runInThisContext (vm.js:97:10)
at Module._compile (module.js:549:28)
at Object.Module._extensions..js (module.js:586:10)
at Module.load (module.js:494:32)
at tryModuleLoad (module.js:453:12)
at Function.Module._load (module.js:445:3)
at Module.require (module.js:504:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (/home/username/domains/website.nl/app/node_modules/ws/index.js:3:19)
[username#server app]$ node -v
v6.16.0
The app:
var fs = require('fs');
var https = require('https');
var prvKey = fs.readFileSync('/home/username/ssl/keys/1.key').toString();
var prvCert = fs.readFileSync('/home/username/ssl/certs/1.crt').toString();
var server = https.createServer({key:prvKey,cert:prvCert});
var serverPort = 3000;
// var server = https.createServer();
var io = require('socket.io')(server);
server.listen(serverPort, function() {
console.log('server up and running at %s port', serverPort);
});
io.on("connection", function(socket) {
console.log("user connected: " + socket.id + " - " + socket.request.connection.remoteAddress);
var activequizid = null;
socket.on('jsondata', function(data){
if(data.join.join == "true"){
console.log(socket.id + " join group " + data.join.quizid)
socket.join(data.join.quizid)
}
})
socket.on('jsondataupdate', function(data){
console.log(data.update)
if(data.update.status){
socket.to(data.update.quizid).emit('update', data.update);
}
})
socket.on("disconnect", function(socketd) {
console.log(socketd)
console.log(this.id)
});
socket.on('connection', function () {
console.log('connection!')
})
socket.on('reconnecting', function () {
console.log('reconnecting!')
})
socket.on('reconnect', function () {
console.log('reconnect!')
})
socket.on('disconnect', function () {
console.log('disconnect!')
})
});
console.log("sever online")
websocket.js (partly function with error (look for "...options")) :
send(data, options, cb) {
if (this.readyState === WebSocket.CONNECTING) {
throw new Error('WebSocket is not open: readyState 0 (CONNECTING)');
}
if (typeof options === 'function') {
cb = options;
options = {};
}
if (typeof data === 'number') data = data.toString();
if (this.readyState !== WebSocket.OPEN) {
sendAfterClose(this, data, cb);
return;
}
const opts = {
binary: typeof data !== 'string',
mask: !this._isServer,
compress: true,
fin: true,
...options
};
if (!this._extensions[PerMessageDeflate.extensionName]) {
opts.compress = false;
}
this._sender.send(data || EMPTY_BUFFER, opts, cb);
}