DL3053

Label `<label>` is not a valid time format - must be conform to RFC3339.

This rule is activated by specifying a label-schema including a label of type rfc3339. This can be done via command line

$ hadolint --require-label created:rfc3339 Dockerfile

or in the config file:

label-schema:
  created: rfc3339

LABEL created="today"

LABEL created="2021-03-23 13:04:29.300508335+01:00"

This rule does not expand variables. It requires the value of a label to be a literal time stamp compliant with RFC 3339.