Decouple the management of configuration data from the consumption
The Twelve-Factor App manifesto emphasizes the importance of separating configuration from source code.
This can be achieved by using a templating system along with a centralized repository for secrets and parameters.
Learn More About Externalizing Config
A single source of truth injects perfect config for build, deploy and runtime
Creating Focus, Flow, and Joy in DevOps processes can be achieved by eliminating configuration friction.
The biggest source of team dissatisfaction is the management of the appropriate configuration settings for each deployment.
Read more about Gene Kim's Five Ideals of DevOps