[MM3-users] Finding a mailman3 installation description that works

WE are currently using mailman2. I have the task to setup and install a maiman3 server. Postfix is installed and working. Can anybody point me to a link where the actual installation is described using RHEL 7 or RHEL 8. This will be a hardened DISA compliant server, so I am trying to avoid installing compilers and tools that are not part of the standard RHEL 7 repos.

Thank You, Best regards, Ralf Wiegand