Volume cloning

[beruic]

Is your feature request related to a problem? Please describe.
Sometimes when I want to upgrade a container, I worry about the data being corrupted by the new container.

Describe the solution you'd like
Since cloning a volume that is currently in use, is hard, I suggest that only volumes that are not currently mounted into a container can be cloned.
This repository contains two scripts that may serve as inspiration for detecting if volumens are mounted, and cloning.
It is also worth to mention that this bug advocates for including the feature in docker it self.

Describe alternatives you've considered
N/A

Additional context
N/A