Update main.py

main.py

@@ -2,7 +2,7 @@
 from fastapi import FastAPI
 from pydantic import BaseModel, Field, HttpUrl
 from typing import List
-
+from fastapi.middleware.cors import CORSMiddleware
 # -- 1. Define Pydantic Models for Data Validation --
 
 # This model defines the structure of the incoming request JSON
@@ -35,6 +35,20 @@ app = FastAPI(
     title="Backend Checker API",
     description="A mock API to validate requests and send simulated responses."
 )
+# ⬇️ ADD THIS MIDDLEWARE SECTION
+# This tells the API to accept requests from your frontend
+origins = [
+    "https://your-firebase-app-name.web.app", # Your production frontend URL
+    "http://localhost:3000",                  # Your local development URL
+]
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=origins,
+    allow_credentials=True,
+    allow_methods=["*"], # Allows all methods, including POST
+    allow_headers=["*"], # Allows all headers
+)
 
 # -- 3. Define the API Endpoint --
 @app.post("/check", response_model=ResponsePacket)