We can install it, via CDN, just adding the link refer to the bootstra's CDN
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-GLhlTQ8iRABdZLl6O3oVMWSktQOp6b7In1Zl3/Jr59b6EGGoI1aFkw7cmDA6j6gD" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/js/bootstrap.bundle.min.js" integrity="sha384-w76AqPfDkMBDXo30jS1Sgez6pr3x5MlQ1ZAGC+nuZB+EYdgRZgiwxhTBTkF7CXvN" crossorigin="anonymous">
We can dowloand, the boostrap files: CSS and Js, files, and releated those to our html
THE DISAVENTAGE of this form is, the browser can't see the cache our navigator
becase, He can't diference your local copy (Who apper like a own file, not like a bootstrap)
so it's can't use the bootstrap in your navigator's cache.
THE BEST WAY, it's mean the recomended form to use bootstrap, is with CDN, case if your browser it's already have it in cache's browser
it's just be used in your page, So, use CDN way like this course will do it