I'm no seasoned Node.js veteran and there's a lot of things I don't know still but one of the first problems or annoyance I had when first playing around with Node.js is having to restart the server everytime I made code changes to a file in order to see the changes live in the browser.
Fortunately there's an easy fix for this if you haven't already discovered it via Google search; Nodemon! Which is easily installed using npm:
Now go forth and start being more productive! :)