Thread:Project:Support desk/Adding to the HEAD tag

I know this is possible, but I'm a novice and am just not getting it.

I'd like to use font awesome icons in mediawiki, where do I add this specific code?



Do I use one of these in localsettings? $out->addHeadItem ? or $out->addMeta?

What does that look like? Mediawiki 1.22

or where/how exactly might I put it in OutputPage.php?