Font Awesome Free 5.3.1
composer require alexandermatveev/fontawesome-bundle
Refer to the desired files in your HTML template, e.g.
<link href="{{ asset('bundles/alexandermatveevfontawesome/css/all.min.css') }}" rel="stylesheet">
<i class="far fa-thumbs-up"></i>
Refer to the source code of the included files for license information