this is a helper note against guest-netbsd-full & guest-netbsd-ext2fs
object storage -- buckets -- YOUR-BUCKET -- Upload (top-right corner)
then create a VM image based on that S3 object
yc --profile PROFILE \ compute image create \ --name netbsd100 \ --source-uri https://storage.yandexcloud.net/YOUR-BUCKET/netbsd100.qcow2
https://cloud.yandex.com/en/docs/compute/operations/image-create/custom-image
https://cloud.yandex.com/en/docs/compute/operations/image-create/upload
https://cloud.yandex.com/en/docs/storage/operations/objects/upload
https://cloud.yandex.com/en/docs/compute/concepts/image#images-optimized-for-deployment
https://cloud.yandex.com/en/docs/compute/api-ref/Image/create