Best Practices for Receiving Multi-Part Form Data?

[vikr00001]

I have the following REST API endpoint set up:

WebApp.connectHandlers.use('/ReceiveCalls', (req, res, next) => {
    console.log( req);
    console.log(res);
    res.writeHead(200);
});

How can I adapt this (or replace it) to receive multi-part form data?