Update app.py

app.py

@@ -16,7 +16,7 @@ INPUT_H = INPUT_W = 512                   # what you trained with
 THRESH        = 0.5                       # binarisation
 DEEP_SUP      = False
 ALPHA         = 0.40                      # overlay transparency
-ALLOWED_FRONT = "https://amitabhm1.github.io"  # GitHub‑Pages origin
+ALLOWED_FRONT = "https://amitabhm1.github.io/polyp-demo"  # GitHub‑Pages origin
 ################ -------------------------------------------------
 
 # ---------------- FastAPI (plus simple CORS) ------------------
@@ -25,7 +25,7 @@ app = FastAPI(title="Polyp Segmentation API")
 app.add_middleware(
     CORSMiddleware,
     allow_origins=[ALLOWED_FRONT, "http://localhost:4173", "http://127.0.0.1:5500"],
-    allow_methods=["POST"],
+    allow_methods=["POST", "OPTIONS"],
     allow_headers=["*"],
 )
 # --------------- load model once at startup -------------------