Node.js/Express Error: connect ECONNREFUSED 127.0.0.1:5000

'use strict';// Set default node environment to developmentvar connectionString = config.mongo.connectionstring;console.log("connection string : "+ connectionString);mongoose.connect(connectionString);// Setup servervar app = express();var httpsOptions = {    key: fs.readFileSync('../server/privatekey.pem'),    cert: fs.readFileSync('../server/certificate.pem')};var baseAddress = 5000;var redirectAddress = 5001;var httpsAddress = 5002;net.createServer(tcpConnection).listen(baseAddress);http.createServer(httpConnection).listen(redirectAddress);https.createServer(httpsOptions, httpsConnection).listen(httpsAddress);function tcpConnection(conn) {    conn.once('data', function (buf) {        // A TLS handshake record starts with byte 22.        var address = (buf[0] === 22) ? httpsAddress : redirectAddress;        var proxy = net.createConnection(address, function () {            proxy.write(buf);            conn.pipe(proxy).pipe(conn);        });    });}function httpConnection(req, res) {    var host = req.headers['host'];    res.writeHead(301, { "Location": "https://"+ host + req.url });    res.end();}function httpsConnection(req, res) {    res.writeHead(200, { 'Content-Length': '5' });    res.end('HTTPS');}// Expose appexports = module.exports = app;