Thumbsup is a command-line tool. Building a gallery is as simple as

thumbsup --input ./myphotos --output ./gallery

The documentation is split into 5 sections

Introduction	What thumbsup is and isn't
Installation	Installing thumbsup and building a simple gallery
Configuration	Details of all configuration settings
Themes	Showcase of the different themes, and how to create a theme
Deployment	How to deploy your galleries offline & online