fix: import app in main.py to resolve import issue in vercel

Author: TimilsinaBimal

main.py

@@ -2,6 +2,7 @@
 
 import uvicorn
 
+from app.core.app import app  # noqa: F401
 from app.core.config import settings
 
 if __name__ == "__main__":

vercel.json

@@ -2,14 +2,14 @@
   "version": 2,
   "builds": [
     {
-      "src": "app/core/app.py",
+      "src": "main.py",
       "use": "@vercel/python"
     }
   ],
   "routes": [
     {
       "src": "/(.*)",
-      "dest": "app/core/app.py"
+      "dest": "main.py"
     }
   ]
 }