Can you provide us the best practice of docker run command for nexus implementation?
Do you have any details you are looking for? The documentation does review how to pull the image from the repository which you would need to do before you run the container in the local environment.
https://help.sonatype.com/repomanager3/formats/docker-registry/pulling-images
Also, the support kb article has some good recommendations on setting up your docker repository to make access to more uniform.
Suspect you are looking for this:
And see here for memory allocation recommendations:
https://help.sonatype.com/display/NXRM3/System+Requirements#SystemRequirements-MemoryRequirements