This is the heart of Turtl!
If you're interested in how Turtl works, check out the docs.
Turtl uses a makefile to generate itself. Here's a fw commands to get you started (this assumed you have Node.js/npm installed already):
mkdir turtl cd turtl/ git clone https://github.com/turtl/js.git cd js/ npm install make
make here generates all the assets for the project and it's now ready
to be run by any webserver (just make sure all requests are send to index.html,
see the .htaccess file for reference).