Add .doreboot file check and message sending functionality

telegram_helper.py

@@ -80,6 +80,14 @@ class TelegramHelper:
                 f.write(str(update.effective_chat.id))
         sys.exit(0)
 
+    async def check_doreboot_file(self, application: Application):
+        reboot_file_path = "./.doreboot"
+        if os.path.exists(reboot_file_path):
+            with open(reboot_file_path, 'r') as f:
+                chat_id = f.read().strip()
+            await application.bot.send_message(chat_id=chat_id, text="The application has finished initializing.")
+            os.remove(reboot_file_path)
+
     def run(self):
         application = Application.builder().token(self.telegram_bot_token).build()
 
@@ -93,7 +101,7 @@ class TelegramHelper:
         
         logging.info("Bot is running...")
 
-        if os.path.exists("./.doreboot"):
-            os.remove("./.doreboot")
-            
+        # Check for .doreboot file and send message if it exists
+        application.create_task(self.check_doreboot_file(application))
+        
         application.run_polling()