The post DTAP: Best practices and database copy tool describes the set-up of various DTAPs for your Novulo application.
When you use DTAP in combination with Headless CMS, there is another set-up that allows for various parallel tracks of individual development of the front-end (head) and the Novulo back-end.
This can be very useful when the release cycle of the front-end is different from the back-end.
It can occur that the Novulo DTA-environment is preparing for a new release due in a few weeks from now, but that your Front-end needs a release much faster, and must be tested on the current production environment.
Then, you need a Pre-live environment, on the same version and configuration and with similar data as production, to Test and Accept your Front-end.
You need your front-end Test and Acc to be able to switch betwen Prelive and Test/Acc.
This is then the set-up and connection when the front-end is releasing faster than back-end.
And when your front-end and back-end are on the same cycle, and the front-end prepares for new back-end releases, you have a more traditional set-up.