GET https://mydomain.link:3000/socket.io/?EIO=3&transport=polling&t=1502934404775-5 net::ERR_INSECURE_RESPONSE

var https = require('https');
    var fs = require('fs');
    var ssl_server_key = 'server_key.pem';
    var ssl_server_crt = 'server_crt.pem';
    var port = process.env.PORT || 3000;



    var options = {
        key: fs.readFileSync(ssl_server_key),
        cert: fs.readFileSync(ssl_server_crt)
    };

    https.createServer(options, function (req,res) {
        res.writeHead(200, {
            'Content-Type': 'text/plain'
        });
        res.end("Hello, worldn");
    }).listen(port);

$(function(){
      var socket = io.connect('https://mydomain.link:3000');
    });