[REQ] image.labels should support arg substitution

[cpuguy83]

What kind of request is this?

None

What is your request or suggestion?

No response

Are you willing to submit PRs to contribute to this feature request?

• Yes, I am willing to implement it.

[cpuguy83]

Note, this should wait until #481 is merged

[cpuguy83]

#481 is in now so should be a good time to work on this.

[MorrisLaw]

Re-assigning to @pmengelbert since he has an open PR for this.