How do I install popper.js, or bootstrap addons, on a FastAPI project in PyCharm/IntelliJ?

I'm working on a FastAPI project using PyCharm, and I have Jinja templates which use some Bootstrap. I would like to add boostrap packages such as bootstrap-dropdown, or popper.min.js.

I've seen this post but I can't wrap my head around how I can add popper.min.js to my project.

How can I do so?