There are 2 options to configure your build output and Vishal highlights the differences between those 2:
- “config Transformation”
- “config Parametrization”
Yes this is for Microsoft tooling.
“Transformation” is only applied via VisualStudio and runs during the build.
“Parametrization” is for deployments and runs during deployment.
Now you should ask: How do I configure my app running in production?
There is no answer from Microsoft, so you free to come up with your own solution!