Enable a preview feature¶
Use previewFeatures in tailor.yaml before you use a feature that is not part of the stable
contract.
Today, signing is the only accepted value. An unknown value is a hard error when tailor reads the
manifest.
A build or validate run that requests signing without this opt-in also fails. Preview features are unstable: their schema and behavior may change until they are promoted.
Related: Sign an image; see the repository-root Compatibility document for the stable contract.