Download the CSS Project from the website with our pro license (but I don't think we can share it with our open source project?). We could add it as a theme component (repo) like the style component but private, to provide the CSS just for that.
We can use the CDN like we do currently on the live site.
@Alteras1,
On the live site, I believe we include the Fontawesome CDN at the top of the PAGE_HEADER Template and call it a day.
On discourse, we've been trialing on T since 2020 this plugin:
https://meta.discourse.org/t/discourse-fontawesome-pro/150871
Cons:
Alternatives: