Alpine Linux OpenStack VM Image
Install Packer: https://www.packer.io/intro/getting-started/install.html
packer build alpine.json
qemu-img convert -f vmdk -O raw output-virtualbox-iso/alpine38-disk001.vmdk output-virtualbox-iso/alpine38-disk001.raw
openstack image create --file output-virtualbox-iso/alpine38-disk001.raw --disk-format raw --container-format bare alpine38