Markdown preview rendering

- https://docusaurus.io/
  install using
  `npx create-docusaurus@latest my-website classic`
  Then run it by
  `cd my-website`
  `npx docusaurus start`
  or
  ```bash
  npm init docusaurus@latest my-website classic
  cd my-website
  npm run start
  ```
  docusarous source code with node_modules
  docusaurus_bkp.7z	https://files.catbox.moe/ibwmte.7z
https://www.mediafire.com/file/9clkafkf7vbxgoj/docusaurus_bkp.7z/file
docusaurus_preview.mp4	https://small.fileditchstuff.me/s6/mEZTgPTjZwvecEmOfAD.mp4