Support temporary injection of secret files in one job or step
"BuildKite currently supports a feature where you could inject a confidential or secret file at a particular step in a build, but it doesn't persist long-term in the environment.
This would be a great feature to have in CircleCI, not only because it wouldn't be accessible to users SSHing into the build environment but also for the fact that it's a secrets file. We've had some issues with inserting contents of whole files into your contexts experience and readability-wise."
Idea gathered from attendee at KubeCon EU 2019