How to programmatically use bootstrap icons in an angular project?

Quite old, but since I had the same problem and these answers where not helpful at all, here is the Solution I came up with.

First install the bootstrap icons package (–save adds it to your dependencies as well):

$ npm i bootstrap-icons --save

Then add this line to your styles.css file:

@import "~bootstrap-icons/font/bootstrap-icons.css";

From now on you can use it anywhere in your app, just like intended by the bootstrap documentation:

<i class="bi bi-star-fill"></i>