I looked at several other open source library software suits with an OPAC but they were either too much of an overkill or unmaintained for a while. My main requirement was the software to support MARC. I eventually decided to go with the traditional open-source ILS Koha.
I decided to install Koha in a LXC container with Debian running on my virtualization server which on itself runs Alpine Linux. So first I created a container:
lxc-create -n koha -f /etc/lxc/default.conf -t download
I then selected the current Debian release and attached to the container afterwards:
lxc-start -n koha lxc-attach -n koha
I then followed the Koha installation manual for Debian.
Koha mostly assumes that staff and OPAC access can be accessed through different subdomains, as such an internal DNS server/and or internal name resolution must be present.
Additional Z39.50 and SRU query servers
See the IRSpy database for further Z39.50 and SRU servers you can setup Koha to query.