* Refactor mdToHtml out
* Refactor routing + move it to server instead of core
* Refactor & Add more tests for server utils
* Refactor isSeparateCss function from server & generate
* Refactor insertTableOfContents from server & generate + add tests
* undo small nits
* Fix bad routing regex for sitemap & feed
* add tests for sitemap & feed
* use next middleware function if file nto found
* add pages routing & test
* refactor + add more test for page routing
* extension-less url routing + test
* refactor out requestFile
* add dot routing + test to handle special case like http://localhost:3000/blog/2018/05/27/1.13.0
* exit properly
* add more test for sitemap
* update nits from my phone