add something about contributing to the docs

CONTRIBUTING.md

@@ -62,3 +62,17 @@ To install packages for every package or application run
 ```
 pnpm add -w [NPM Package]
 ```
+
+### Docs
+
+To contribute to the docs, go to the docs website folder and run the Docusaurus instance.
+
+```bash
+cd apps/docs
+pnpm install
+pnpm start
+```
+
+That should start a webserver which will serve the docs on https://localhost:3000
+
+Any changes you make should be reflected in the browser. If you need to regenerate the API docs and find that your TSDoc isn't getting the updates, feel free to remove apps/docs/api. It will automatically regenerate itself when you run pnpm start again.