Separate some function to other than `index.js`

[pap-git]

currently every server function is in the index.js

to make server easier to debug/manage and more reasons, i would like to separate some of function to other js
(e.x. /search function (sorting included), assets redirector, config/template reloader, etc)
separated js would be located to /js/[category]/[function name].js ok thx