Feat/sub-route (#38)

* blog subroute support
* docs: update readme and blog

Co-authored-by: mrhut10 <ahut10@gmail.com>

components/Tag.js

@@ -1,5 +1,5 @@
 import Link from 'next/link'
-import { kebabCase } from '@/lib/utils'
+import kebabCase from '@/lib/utils/kebabCase'
 
 const Tag = ({ text }) => {
   return (