Fixes config

* Gave you some bad advice about the uglify task. Turns out it's still
used, but the ngmin task swoops in before-hand to overwrite 
generated/app.js with an angular-safe minification, which turns out to
safeguard it against uglify's mangling
* Sets the prefix to "api" since that matches what you have in your
`config/server.js` and seems to be what a lot of folks use.

Unfortunately neither of these seem to be the root of the problem with
the error you encounter in dist/index.html