feat: add settings.lnbits_running (#2450)

* feat: add `settings.lnbits_runing `

lnbits/app.py

@@ -69,6 +69,8 @@ from .tasks import (
 
 
 async def startup(app: FastAPI):
+    settings.lnbits_running = True
+
     # wait till migration is done
     await migrate_databases()
 
@@ -104,6 +106,9 @@ async def startup(app: FastAPI):
 
 
 async def shutdown():
+    logger.warning("LNbits shutting down...")
+    settings.lnbits_running = False
+
     # shutdown event
     cancel_all_tasks()
 
@@ -181,7 +186,7 @@ async def check_funding_source() -> None:
     max_retries = settings.funding_source_max_retries
     retry_counter = 0
 
-    while True:
+    while settings.lnbits_running:
         try:
             logger.info(f"Connecting to backend {funding_source.__class__.__name__}...")
             error_message, balance = await funding_source.status()
@@ -412,7 +417,7 @@ def initialize_server_logger():
     serverlog_queue = asyncio.Queue()
 
     async def update_websocket_serverlog():
-        while True:
+        while settings.lnbits_running:
             msg = await serverlog_queue.get()
             await websocket_updater(super_user_hash, msg)