Credit to where it's due

Originally forked from: https://github.com/mosbth/cimage

Not a real changelog but still:

Somewhat adjusted codebase to serve as a CDN for rene.io and renesebastian.nl. Nothing special, check original repo for all it's functions.

• Optimized to run as a CDN
• Stripped clean of unnecessary code and files
• Did some error messaging adjustments