Here you'll build a simple app without using any frameworks. Recommended to get a first touch at node: The Node Beginner Book » A comprehensive Node.js tutorial
Aiming at developers that already have experience with other programming languages means that this document won't cover really basic stuff like data types, variables, control structures and the likes. You already need to know about these to understand this document.
The URL router implemented there can easily be augmented to serve static files, using the
fs module to read them on disk.