0.12.0 - Easier indexes, rate limits

Custom indexes are now easier to plug into ass. No more config modifications, now you can simply have a file in the share/ directory named either index.html or index.js (for custom Express middleware) and ass will automatically serve your content.

Additionally in this release:

• New theme system (more to come in a later version with bigger announcement)
• Added basic rate limiting system. I'll improve this in the future.
• Updated Docker files: use node user rather than root; removed redundant directives; simplified command order

Full Changelog: releases/0.11.0-rc.1...releases/0.12.0