signo was built in the objective of being a robust base that can expend easily according to users contributions. Because open and shared knowledge is a key to our society and expending intelligence, we allow anyone to submit contributions.
If you want to take part of the signo project, all you have to to is head to our GitHub repository where you can read the instructions on how to clone our documentation to your machine to start working.
Indeed, you must have a bit of Git knowledge in order to make a pull request and to understand the way a Version Control System works. If you don't have this knowledge, don't worry, just head to the web for a tutorial. This one from Roger Dudler is pretty simple and available in multiple languages.