feat(posts): add clean-code

package.json

@@ -49,6 +49,7 @@
     "react": "17.0.2",
     "react-dom": "17.0.2",
     "read-pkg": "7.0.0",
+    "rehype-slug": "5.0.0",
     "remark-gfm": "3.0.1",
     "remark-prism": "1.3.6",
     "sharp": "0.29.2",