Yes, I think Alpine is very good for this purpose because it is very lightweight. Otherwise you can try Debian CLI

Everything is fine. It’s always nice to learn something new. Hope you will have better week!

Also systemd says I am using initrd (on my Fedora machine)

systemd[1]: Running in initrd.

But I have initramfs packed with dracut in /boot folder

/boot/initramfs-6.12.8-200.fc41.x86_64.img

Yes, seems like Devuan also use update-initramfs (discussion link) as expected. So I think process will be similar to upstream Debian.

Based on first result

We can use initrd for Linux kernels 2.4 and lower. Conversely, initramfs is for kernels 2.6 and above.

Since on all modern system initial filesystem is tmpfs sometimes it is confused and initramfs is called initrd (for example: in grub to load initramfs you use initrd command).

If so what is the difference?

AFAIK initramfs is the same thing as initrd. But do you have update-initramfs command available?

ln: /usr: hard link not allowed for directory