Thank you your interest in this project!
This repo is for the Glest web site.
The guidelines for contributing are the same for the Glest source code, and can be found in CONTRIBUTING.md (link leads to a different repository in the Glest organization). That document also contains the instructions for performing pull requests. The only difference is that this repo uses the master branch.
For information about working on this site or the other Glest web site (a site that displays game statistics is in another repo), see the WEBSITE_DESIGN.md document.