Contribution is highly encouraged. If you find anything in the game that is not listed in these articles and would like to help, please feel free to hop onto the GitHub Repo and open a Pull Request with the changes. If you are new to Markdown, I strongly advise you to visit this beautiful guide by CommonMark. It has a tutorial (Click "Try our 10-minute Markdown Tutorial") to help you learn Markdown, and a quick reference for the most important aspects of Markdown.
To get started with Mindustry, head on over to here!