define function name

package.json

@@ -8,7 +8,7 @@
     "build": "next build",
     "start": "next start",
     "predeploy": "npm run clean && next build",
-    "deploy": "firebase deploy --only functions,hosting"
+    "deploy": "firebase deploy --only functions:nextjs,hosting"
   },
   "dependencies": {
     "firebase-admin": "~8.12.1",