Changed the algorithm of the start method

tests/test_app.py

@@ -21,10 +21,11 @@ class MyApp(ConfigManager):
 
 async def main():
     app = MyApp("config.yaml")
-    app.start()
+    await app.start()
     logger.info("App started")
-    await asyncio.sleep(20)
-    await app.stop()
+
+    while True:
+        await asyncio.sleep(1)
 
 if __name__ == "__main__":
     asyncio.run(main())