Fix CORS preflight 405 error

Author: chetanr25

apps/backend/app/routes/auth.py

@@ -30,6 +30,13 @@ class AuthResponse(BaseModel):
     user: dict
 
 
+@router.options("/google")
+async def google_auth_options():
+    """
+    Handle OPTIONS request for Google Auth
+    """
+    return {}
+
 @router.post("/google", response_model=AuthResponse)
 async def google_auth(request: GoogleAuthRequest):
     """