Image definitions in the configuration can now be regexes:
masterInstance:
type: de.NBI small
image: Ubuntu 22\.04 LTS \(.*\)
fallbackOnOtherImage takes either a bool value or a regex. If True is given, the nearest image by name is used if the original image (can be regex) is not found among the active images. If a regex is given, the first regex match is used instead when the original image (can be regex) is not found among the active images.