upgade to latest nextra and add tailwind

Author: daviddkkim

next.config.js

@@ -1,7 +1,6 @@
 const withNextra = require('nextra')({
   theme: 'nextra-theme-docs',
-  themeConfig: './theme.config.js',
-  unstable_staticImage: true,
-  strictMode: true
+  themeConfig: './theme.config.tsx',
 })
+
 module.exports = withNextra()