feat: Enable (or not) email or Telegram notifications

crossfit_booker.py

@@ -91,13 +91,22 @@ class CrossFitBooker:
             "to": os.environ.get("EMAIL_TO"),
             "password": os.environ.get("EMAIL_PASSWORD")
         }
-        
+
         telegram_credentials = {
             "token": os.environ.get("TELEGRAM_TOKEN"),
             "chat_id": os.environ.get("TELEGRAM_CHAT_ID")
         }
 
-        self.notifier = SessionNotifier(email_credentials, telegram_credentials)
+        # Get notification settings from environment variables
+        enable_email = os.environ.get("ENABLE_EMAIL_NOTIFICATIONS", "true").lower() in ("true", "1", "yes")
+        enable_telegram = os.environ.get("ENABLE_TELEGRAM_NOTIFICATIONS", "true").lower() in ("true", "1", "yes")
+
+        self.notifier = SessionNotifier(
+            email_credentials,
+            telegram_credentials,
+            enable_email=enable_email,
+            enable_telegram=enable_telegram
+        )
 
     def get_auth_headers(self) -> Dict[str, str]:
         """