Nexus Dcoker repo - Port is not listening

Wondering if anyone else has this issue, I configured the docker repo on port 8083 (per document). i realized the port is listening on the servers (rhel). It is not bound to the service. I am sure i am missing something, any help would be appreciated.
I followed below link for configuration:

I can see the HTTP port is listening, but not https, locally on nexus server