<fix> app using only one thread.

app.py

@@ -317,4 +317,4 @@ def create_app():
 
 if __name__ == "__main__":
     init_basemodel()
-    create_app().launch(debug=True, ssr_mode=False)
+    create_app().launch(debug=True, ssr_mode=False, max_threads=1)