Thanks for contributing to this project. Any addition and comment is useful, and we're grateful that you are investing some time.
There are a number of ways to contribute. Before you start, please have a look at our Code of Conduct. It boils down to be nice and respectful -- no contribution, no matter how amazing it may be, justifies or excuses bad behaviour.
The first thing you can do is comment on Issues that have the "Request for feedback" label. They represent situations for which we are actively seeking community feedback, and anyone is always welcome to chime in.
If you are not sure about opening an issue, you can use the chatroom. We'll be glad to have a more informal conversation with you!
If there is a more specific point you would like to raise, you can create a new Issue, and explain your idea, critique, or comment. And of course, you can always browse the current Issues, to get a sense of what is being discussed.
If you want to contribute more, then great! Have a look at the contribution guidelines first, to get you started with setting up a development environment. You can have a look at "Good first issues", if you want some inspiration.
All of the content is built using Literate.jl. The lessons themselves are Julia scripts, and they are compiled to markdown using github actions. It is a good idea to look at existing modules to get a sense of how to do callouts, etc.
The references are in the references.bib file at the root of the project.
Finally, all lessons undergo formatting (using the "Format Document") command in VSCode.