fix vite config properly

package.json

@@ -3,6 +3,7 @@
   "version": "1.0.0",
   "description": "This README would normally document whatever steps are necessary to get the application up and running.",
   "main": "index.js",
+  "type": "module",
   "directories": {
     "lib": "lib",
     "test": "test"

vite.config.ts

@@ -0,0 +1,19 @@
+import { defineConfig } from 'vite'
+import RubyPlugin from 'vite-plugin-ruby'
+import tailwindcss from 'tailwindcss'
+import autoprefixer from 'autoprefixer'
+
+export default defineConfig({
+  plugins: [
+    RubyPlugin(),
+  ],
+  css: {
+    postcss: {
+      plugins: [
+        tailwindcss,
+        autoprefixer,
+      ],
+    },
+  },
+  assetsInclude: ['**/*.png', '**/*.jpg', '**/*.jpeg', '**/*.gif', '**/*.svg'],
+})