Nodejs socket io connect error ERR_CERT_AUTHORITY_INVALID - node.js

Question

My error isindex.js:83 WebSocket connection to 'wss://54.38.211.175:3000/socket.io/?EIO=3&transport=websocket' failed: Error in connection establishment: net::ERR_CERT_AUTHORITY_INVALID
Server codes
var fs = require('fs');
var options = {
key: fs.readFileSync('privateKey.key'),
cert: fs.readFileSync('certificate.crt')};
var app = require('https').createServer(options);
var io = require('socket.io')(app);
io.on('connection', function(socket) {
socket.emit('on_test', {'x': 1});
});
app.listen(3000);
Client codes
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.1.1/socket.io.js"></script>
<script>var HOST = "https://54.38.211.175:3000"; // PUT YOUR VPS IP THERE
var SOCKET = null;
if (!SOCKET) {
SOCKET = io.connect(HOST, {rejectUnauthorized: false ,secure: true,transports: ['websocket']});
SOCKET["on"]("connect", function (b) {
console["log"]("baglandim");
});
SOCKET["on"]("connect_error", function (a) {
console.error("eror =" + a);
});
console.log(SOCKET);
}</script>
i create ssl but its doesnt work.my site works with SSL so I'm not connecting to socketio with http

Answer 1

i solve .
the certificate of the website connected to the socketio nodejs must be read.
for plesk
var fs = require("fs");
var options = {
key: fs.readFileSync(
"/usr/local/psa/var/modules/letsencrypt/etc/live/YOURSITE/privkey.pem"
),
cert: fs.readFileSync(
"/usr/local/psa/var/modules/letsencrypt/etc/live/YOURSITE/fullchain.pem"
)
};
var app = require("https").createServer(options);
var io = require("socket.io").listen(app);
app.listen(2083);
//app.listen(PORT);
console.log('acigim');