The same way and principles, actually containers mimics the golden image pattern used in physical infrastructure.
You need an image (qcow, raw, etc) of your vm with the things you want installed on it. Then you distribute it across computers that will used it through qemu, libvirt, etc.
You need an image (qcow, raw, etc) of your vm with the things you want installed on it. Then you distribute it across computers that will used it through qemu, libvirt, etc.
It's also interesting to see how pxe works :-)