Change docker root-data

# https://blog.adriel.co.nz/2018/01/25/change-docker-data-directory-in-debian-jessie/

sudo nano /etc/docker/daemon.json
{
  "data-root": "/new/path/to/docker-data"
}

sudo systemctl stop docker

sudo rsync -axPS /var/lib/docker/ /new/path/to/docker-data

sudo systemctl start docker

docker ps

sudo rm -r /var/lib/docker