Update payment_api.py

payment_api.py

@@ -15,7 +15,9 @@ logger = logging.getLogger(__name__)
 app = FastAPI(
     title="Invoice Payment API",
     description="Payment processing simulation for invoice automation",
-    version="1.0.0"
+    version="1.0.0",
+    root_path="/proxy/7860"
+
 )
 
 TRANSACTIONS: Dict[str, Dict[str, Any]] = {}