Add file script để build prodution ứng dụng

Fix lỗi Push không chạy ngầm

1. Register for push notification in app delegate.
2. Add background mode in app capabilities.
3. Add "content-available"="1" while sending the push notification(if you are using firebase replace "content-available"="1" by "content_available"="true" 

Fix lỗi Failed to instantiate the default view controller for UIMainStoryboardFile 'Main'