Document remote repo usage via kickstart

[Obihoernchen]

Show some examples how to do it.

# cat /var/lib/confluent/public/os/alma-9.4-x86_64-gpu/kickstart.custom 
firewall --disabled
selinux --permissive

# Repos via local mirror
repo --name=baseos-local --baseurl=http://10.0.0.1/repos/almalinux/9.4/BaseOS/x86_64/os --install
repo --name=appstream-local --baseurl=http://10.0.0.1/repos/almalinux/9.4/AppStream/x86_64/os --install
repo --name=crb-local --baseurl=http://10.0.0.1/repos/almalinux/9.4/CRB/x86_64/os --install
repo --name=extras-local --baseurl=http://10.0.0.1/repos/almalinux/9.4/extras/x86_64/os --install

# cat /var/lib/confluent/public/os/alma-9.4-x86_64-gpu/scripts/post.custom 
dnf config-manager --disable baseos appstream extras crb
rm -f /etc/yum.repos.d/local-minimal.repo
#dnf config-manager --save --setopt=*-local.gpgcheck=0

Furthermore, show how to create images without using an iso file.