Update detection_api.py

detection_api.py

@@ -41,7 +41,7 @@ app.add_middleware(
     allow_headers=["*"],
 )
 
-lass StandaloneApplication(BaseApplication):
+class StandaloneApplication(BaseApplication):
     def __init__(self, app, options=None):
         self.application = app
         self.options = options or {}