I wrote that inlining your <svg> icons makes for the best icon system. Scott Jehl wrote that just because you inline something doesn't mean you can't cache it. Let's see if Scott's idea can extend to SVG icons.
This works on macOS:
php -S localhost:2222
There is a wildly simple build step here:
node build/build.js
It's just so that the SVG icons can be included and not duplicated needlessly.