git clone https://github.com/xamohsen/notification_system.gitcd notification_systemdocker-compose up
docker exec -it notification_system_app_1 bashrspec
docker exec -it notification_system_app_1 bashrails db:seed- Use Postman to send notification to two users one with ID in range {1->10} and the other with ID from {11->20} and in the server log you will see that the first one will get the message in English and the other one will get it in Arabic.