In order to develop, first install cargo if you haven't already:

curl https://sh.rustup.rs -sSf | sh

Then install mdbook (make sure to restart your terminal if you just installed rust before running the following)

cargo install mdbook mdbook-mermaid

Then you can clone the repo and run mdbook serve

git clone https://github.com/Anteater-Electric-Racing/aer-documentation
cd aer-documentation
mdbook serve