Bug 1038395 - Build CTA landing page for learners / makers

<http://localhost:9006/from/firefox-2014/>
<http://localhost:9006/for/learners/>
<http://localhost:9006/for/mentors/>
Ah, ok. I once heard that `use strict` could also be used by JS interpreters to run code faster, since the more restrictive runtime environment means more potential optimizations can be made, but I have no idea if that has actually been taken advantage of by any browsers. And either way, it probably isn't relevant for code like this, but might be worth noting for the future.