feat: support artifact preview

backend/src/gateway/app.py

@@ -39,7 +39,7 @@ def create_app() -> FastAPI:
     # Add CORS middleware
     app.add_middleware(
         CORSMiddleware,
-        allow_origins=config.cors_origins,
+        allow_origins=["*"],
         allow_credentials=True,
         allow_methods=["*"],
         allow_headers=["*"],