Check docs here http://mityalebedev.github.io/jbdm/.
to host you can run a simple http server from the root of this dir, like
python3 -m http.server
there are errors in both the menu.json and json-menu.javascript. once fixed, you should see a page with a dropdown in the following format:
Cars - Toyota - Corolla - 2013
Motorbikes - Honda
- Kawasaki
- BMW