Install open media vault server on orange pi zero - Debian.

install-open-media-vault-orange-pizero.sh

#!/bin/bash
#### PART ONE
cat > /etc/apt/sources.list.d/openmediavault.list << EOF
# deb http://packages.openmediavault.org/public arrakis main
deb http://downloads.sourceforge.net/project/openmediavault/packages arrakis main
## Uncomment the following line to add software from the proposed repository.
# deb http://packages.openmediavault.org/public arrakis-proposed main
# deb http://downloads.sourceforge.net/project/openmediavault/packages arrakis-proposed main
## This software is not part of OpenMediaVault, but is offered by third-party
## developers as a service to OpenMediaVault users.
# deb http://packages.openmediavault.org/public arrakis partner
# deb http://downloads.sourceforge.net/project/openmediavault/packages arrakis partner
EOF

### PART TWO

export LANG=C
export DEBIAN_FRONTEND=noninteractive
export APT_LISTCHANGES_FRONTEND=none
sudo apt-get update
sudo apt-get upgrade
sudo apt-get --allow-unauthenticated install openmediavault-keyring
sudo apt-get update
sudo apt-get --yes --force-yes --auto-remove --show-upgraded \
	--no-install-recommends \
	--option Dpkg::Options::="--force-confdef" \
	--option DPkg::Options::="--force-confold" \
	install postfix openmediavault
# Initialize the system and database.
sudo dpkg-reconfigure openmediavault
sudo omv-initsystem

Which OMV version is this script supposed to install on pi zero?
You have to run it on top of a fresh Raspberry Pi OS install?