How to include local JS lib

I refer to this post How to include and use a external library inside GDevelop - #11 by arthuro555

The solution to include external js files via a cdn, works great.
I would like to load not all via an external repository. How to load JS files local?

I tried different location root and “assets” folder of my project.

But its never located here and of course not loaded.

is there a way to load it? Don’t want to develop everything inside of the small JS (and want to use modern JS frameworks like TS and node) window of GD or upload always to my AWS S3.