PHP Bootstrap
phpstrap.in
phpstrap.in
Or, if you want to get clever, add it to a Composer repo, and have a shell script run after the update that copies stuff from the vendor folder into /public (that tripped me up on pagodabox but it's doable) and now you have Bootstrap running with auto updating and dependency management.
Why does this need to be a service?
nitpick: Your features UL renders everything centered which looks odd at desktop resolution...
Besides this is not something that any developer cant do in a couple of hours of work. So not releasing your code doesn't really have any impact.
But 15 years old and coding is impressive. I was rotting day and night playing Civ 3 at that age :) Wish i didn't :)