Confused! app.bundle.js main.js app/?

A couple of years ago, I created a project in the original Ionic Framework. Now I want to learn Ionic2, so I figured I’d start right at the beginning using the v2 tutorial.

I’ve basically fallen at the first hurdle. ./www/app doesn’t exist and there’s no app.bundle.js created, instead there’s a build/main.js

I’ve done a lot of searching but can’t seem to find anything concrete. Is there any updated documentation?

PS: I started with the tutorial project, and it runs fine with no errors, but I can’t follow the tutorial because the file structure is completely different.

It feels like there’s been some fundamental changes but everyone’s keeping quiet about it!?