the Navbar Component is not very comfortable to read and update, this is because it is written in pure html, it could be improved by managing a json file per subcategory which contains the index and which is loaded during loading of the webapp, the json will populate the navbar entries.

expected result: 3 json files (machine-learning, machine-learning-eng, projective-geo) with json nodes, where each json level has been rendered as ol tag if the level has childs, or li tag if it is empty