23. Docker: Save and Load an Image
docker pull nginx
docker image save nginx # nginxbackup.tar
gzip nginxbackup.tar
docker image rm nginx
docker image ls
docker image load [nginxbackup.tar.gz]
docker image ls
docker pull nginx
docker image save nginx # nginxbackup.tar
gzip nginxbackup.tar
docker image rm nginx
docker image ls
docker image load [nginxbackup.tar.gz]
docker image ls
