How to serve static file using Restify

I am working with a node application, where I need to serve static files(js,css).

My project structure is like below:

-Projectroot
     -restifyServer
         -server.js
     -frontEnd
         -index.html
         -js
         -partials
         -css

server.js is not only the server it serves XML also.

Also for serving index.html I have routing like below:

server.get('/', getIndexhtml);

And getIndexhtml callback is like:

var getIndexhtml = function indexHTML(req, res, next) {
    fs.readFile(__dirname + '/../frontendapp/index.html', function (err, data) {
        if (err) {
            next(err);
            return;
        }
        res.setHeader('Content-Type', 'text/html');
        res.writeHead(200);
        res.end(data);
        next();
});
}

When I start server and navigate my browser to 'http://localhost:8080/' it loads html without static files.

In console I get error like below:

http://localhost:8080/js/library/jquery.js 404 (Not Found)

How can I configure resitfy to serve static files. I have tried this solution but couldn't make it work.

Thanks in advance.