After some discussion on ticket 7413, came the idea to warn the users about the recommended HW requirements to install IPA. This could be done in two ways:

• A warning in the code, checking if the machine has the right amount of resources (when running ipa-server-install)
  To do this we could use psutil (it's a lib to get HW information from the host, we use it on PR CI).

• A section on the man page, describing the recommended HW requirements.