magento2 – Whenever the GIT source code sends source code to Magento Cloud, the message "Service temporarily unavailable" is displayed.

Whenever GIT sends source code to Magento Cloud, the message "Service temporarily unavailable" is displayed.
I've googled a solution that removes the .maintenance.flag file in / var.
But this action I have to do after each GIT push action. is there another way to solve this problem?

service temporarily unavailable
The server is temporarily unable to respond to your request due to maintenance interruptions or capacity issues. Please try again later.