Clarify scope of quickstart prerequisites

Author: aneta-petrova

guides/common/modules/ref_system-requirements-quickstart.adoc

@@ -3,6 +3,10 @@
 [id="system-requirements"]
 = System requirements
 
+//The requirements in this section must match the full requirements in the installation guide.
+The following list shows the most critical requirements common for most scenarios.
+For a full list, including requirements for less common scenarios, see {InstallingServerDocURL}[_{InstallingServerDocTitle}_].
+
 * The following operating systems are supported for deploying {Project}:
 +
 .Operating systems supported for deploying {Project}
@@ -25,7 +29,3 @@ ifdef::foreman-el,katello,orcharhino[]
 endif::[]
 * Install {ProductName} on a freshly provisioned system that serves no other function except to run {ProductName}.
 * Ensure the system has at least {project-minimum-memory} of memory
-
-.Additional resources
-* {InstallingServerDocURL}operating-system-requirements[Operating system requirements in _{InstallingServerDocTitle}_]
-* {InstallingServerDocURL}system-requirements[System requirements in _{InstallingServerDocTitle}_]