NOTES
based on cgruver's work:
Using qemu specific -fw_cfg name=opt/com.coreos/config,file=path/to/example.ign
. Details here:
- https://docs.fedoraproject.org/en-US/fedora-coreos/bare-metal/
- https://docs.fedoraproject.org/en-US/fedora-coreos/provisioning-qemu/-fw_cfg name=opt/com.coreos/config,file=path/to/example.ign`