Express is the leading Node.js app framework, learn to use it well
Where should you put routes in an Express/Node.js web application for simple easy coding enjoyment? Express is very open-minded about how you organize the code in your application. Rather than strictly enforcing that models go here, and control logic goes there, Express gives you an API and some helpful suggestions on what to do. It's up to you how to organize the application from there.
How to get URL params after '?' in Express.js or Node.js? A key fundamental part of web application programming is to decode the URL, extracting the important bits.