feat: add settings.lnbits_running (#2450)

* feat: add `settings.lnbits_runing `

lnbits/core/views/websocket_api.py

@@ -4,6 +4,8 @@ from fastapi import (
     WebSocketDisconnect,
 )
 
+from lnbits.settings import settings
+
 from ..services import (
     websocket_manager,
     websocket_updater,
@@ -16,7 +18,7 @@ websocket_router = APIRouter(prefix="/api/v1/ws", tags=["Websocket"])
 async def websocket_connect(websocket: WebSocket, item_id: str):
     await websocket_manager.connect(websocket, item_id)
     try:
-        while True:
+        while settings.lnbits_running:
             await websocket.receive_text()
     except WebSocketDisconnect:
         websocket_manager.disconnect(websocket)