rawgit.luolix.top is a CDN which returns correct mime types for many file types. It can be used to view this html in your browser here:
https://rawgit.luolix.top/kkuchta/RandomImagur2/master/index.html
It's a flat file. Just open out/index.html in a browser.
The code is in /src
grunt will compile the code to /out
grunt watch will compile the code wheneve it changes, and has live-reload.