Edit: Oops!! Never mind. I glossed over the fact that this was mentioned in the book.
Just started Chapter 15 and I’m getting a request for favicon.ico whenever the server gets a request from Chrome. Here’s my code so far (The JSON file is in the CSS pen): http://codepen.io/anon/pen/QpLYYb
Screenshot of terminal output: http://i.imgur.com/WLQF7Xa.png