add a note

README.md

@@ -2,6 +2,8 @@
 
 > [VuePress](http://vuepress.vuejs.org/)' little brother, built on top of [vite](https://github.com/vuejs/vite)
 
+**Note this is early WIP! Currently the focus is on making Vite stable and feature complete first. It is not recommended to start using this for anything yet.**
+
 ``` bash
 npm install -D vitepress
 echo '# Hello VitePress' > index.md
@@ -13,8 +15,6 @@ npx vitepress
 npx vitepress build
 ```
 
-Note this is early WIP! The default theme is non-existent, but the basic workflow is there.
-
 ## Customization
 
 Configuration can be done via `.vitepress/config.js` (see `src/config.ts`)