dockerPull : hostname and port?

CWL Questions
1 
cwlVersion: v1.0
class: CommandLineTool

hints:
  DockerRequirement:
    dockerPull: ubuntu

I plan to host my own docker registry.

Does dockerPull support hostname and port number variant ?

cwlVersion: v1.0
class: CommandLineTool

hints:
  DockerRequirement:
    dockerPull: localhost.localdomain:5000/ubuntu

Cheers

2

It should, yes, as shown in docker pull | Docker Docs

Over in GitHub - common-workflow-library/bio-cwl-tools: CWL CommandLineTool descriptions for biology/life-sciences related applications we reference the quay.io registry (though without a port number)