feat(registry url): add default registry url

[armanexplorer]

From now on, you can set a registry URL in the script file and the script will use it until you provide a manual one in the command.

[armanexplorer]

@byrnedo
I would appreciate your help in merging this PR to remove the need to type the same registry URL for each command

[armanexplorer]

I am excited about the PR to be accepted. This will help a lot in writing shorter commands :)