podman/docs/source/markdown/options/layer-label.md

####> This option file is used in: ####> podman build, farm build ####> If file is edited, make sure the changes ####> are applicable to all of those.

--layer-label=label[=value]

Add an intermediate image label (e.g. label=value) to the intermediate image metadata. It can be used multiple times.

If label is named, but neither = nor a value is provided, then the label is set to an empty value.