CI_CACHE_ACR_NAME Secret for CI/CD Not Documented

[macromania]

Currently CI_CACHE_ACR_NAME secret is used throughout the workflows and lack of it in the secrets fails the workflows in a repo created from scratch. This required secret is visible in the Makefile and action yamls but not at the documentation.

Most probably this page is the best place to require it:
https://microsoft.github.io/AzureTRE/latest/tre-admins/setup-instructions/cicd-pre-deployment-steps/

[tamirkamara]

I agree there's some documentation needed but not for the secret itself.
To explain, I would say this "secret" is injected from parent workflows and not needed to be present in GitHub environment secrets. The errors you are referring to are probably due to the main branch not being run prior to any other PR workflow. The ACR in CI_CACHE_ACR_NAME is being created by that run and later used in the PRs.