Add information about how to create a .qcow2 file
Since creating a VM in another location isn't going to happen (#273 (comment 545595)), maybe it would be cool to inform in the docs about how to create a .qcow2 file manually. I usually run qemu-img create -f qcow2 -o preallocation=off <disk_filename>.qcow2 <disk_size>G
Edited by Automeris naranja