You can manage the creation of all the Docker certificates from a script bundled within the LiveSP installer:

This script will ensure you have all the required certificates on your servers and create them if some are missing. You can use the -f option to force the generation of all certificates (and CA).

You can also opt for managing your certificates with your own tools or at hand. In that case please read the following Docker link: protect the Docker daemon socket and ensure you have the Docker certificates created in the following path: