feature: Add an option to enable Telegram to work behind a proxy. (#6125)

Co-authored-by: Frank Elsinga <frank@elsinga.de>

server/notification-providers/serwersms.js

@@ -17,6 +17,7 @@ class SerwerSMS extends NotificationProvider {
                     "Content-Type": "application/json",
                 }
             };
+            config = this.getAxiosConfigWithProxy(config);
             let data = {
                 "username": notification.serwersmsUsername,
                 "password": notification.serwersmsPassword,