dist folder added to backend

frontend/package.json

@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
-    "build": "vite build",
+    "build": "vite build && rm -rf ../backend/dist && cp -R dist ../backend/dist",
     "preview": "vite preview"
   },
   "dependencies": {