I am working on a cluster stack based on Ansible (https://github.com/oxedions/bluebanquise), and I am working on including Ubuntu LTS support in it

I could deploy Ubuntu 18.04 using PXE and preseed for full automation. However, I am having issues with the repositories.
The Server CD iso contains the absolute bare minimum packages, but not all that is needed for a minimal cluster.

Is there with Ubuntu a DVD, like for Debian for example, that contains the "standard" (if a standard exist...) server packages (apache, tftp server, chrony/ntp, bind, dhcp, nfs server, ldap server, etc) ? Or is there a way to get this kind of repository easily, without downloading the whole Ubuntu repositories, which are of course big ?

Any idea would help me a lot

With my best regards