If you want to start writing your first application with Dancer, you certainly want to read the Dancer Manual guide. It will help you understand the basics of Dancer.
You can also find interesting and working examples in the Cookbook. There are lots of recipes in there to help you handle common patterns in web development. The Tutorial also helps if you like to learn by example.
The DSL's reference API is documented in Dancer2.pm.
Dancer is PSGI-compatible, that means you can virtually deploy your app anywhere. We wanted to help our users as much as possible, so we've gathered as many details as possible in a Deployment Guide, in order to provide working configuration examples.
Even though special care is given to documentation, there might be some errors, so feel free to contact the development team if you find any.