• Demo site
• GitHub link

1. npm install vitepress-theme-flexoki
2. Then add the theme css to vitepress theme config file:

// .vitepress/theme/index.ts
import DefaultTheme from 'vitepress/theme'
import 'vitepress-theme-flexoki/index.css'

export default DefaultTheme

Instead of installing the package, you can also manually place the index.css file in your theme folder.