A basic and very bare theme that you can build your own theme from. There isn't really any layout or content but file structure and examples of classes to start with.
The theme itself would be installed just like any other. Download the contents of this repository to your wp-content/themes directory.
Add DustPress in the mix by requiring it via composer and using Composer's autoloading feature or simply clone its repository to your preferred destination and require the dustpress.php file in the beginning of the functions.php of the theme.
Then just activate the theme from the WordPress admin panel, and you are good to go!
Further instructions on how to develop with DustPress can be found at the readme file of the main project.