We would be glad if you contribute to Zammad. You can do this in several ways. Contributions are mainly done by forking one of our repos on GitHub and creating a pull request with your changes.
All repos can be found at https://github.com/zammad
The Zammad source code can be found on GitHub at https://github.com/zammad/zammad
Do you want to contribute to the Zammad documentation?
Open a new GitHub pull request at https://github.com/zammad/zammad-documentation with your changes.
The Zammad documentation is hosted on readthedocs.org. You can read it there at https://docs.zammad.org or browse the files via GitHub which also renders the used ReStructuredText markup.
If you like to edit the docs use the ReStructuredText markup language. Information about this language can be found at:
Thanks! ❤ ❤ ❤