fix: ensure public files are copied to dist

vite.config.ts

@@ -3,18 +3,10 @@ import react from '@vitejs/plugin-react'
 
 export default defineConfig({
   plugins: [react()],
-  server: {
-    cors: true,
-    headers: {
-      'Access-Control-Allow-Origin': '*'
-    }
-  },
-  preview: {
-    port: 804,
-    host: true,
-    strictPort: true
-  },
   build: {
+    outDir: 'dist',
+    assetsDir: 'assets',
     copyPublicDir: true
-  }
-})
+  },
+  publicDir: 'public'
+})