OSDOCS-11800: note in install docs about secure access

Author: aravipra

modules/microshift-install-system-requirements.adoc

@@ -15,3 +15,8 @@ The following conditions must be met prior to installing {microshift-short}:
 * 10 GB of storage.
 * You have an active {microshift-short} subscription on your Red Hat account. If you do not have a subscription, contact your sales representative for more information.
 * You have a Logical Volume Manager (LVM) Volume Group (VG) with sufficient capacity for the Persistent Volumes (PVs) of your workload.
+
+[IMPORTANT]
+====
+Secure access must be configured before running {microshift-short} to ensure proper functionality and security. For more information, see link:https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/securing_networks/assembly_using-secure-communications-between-two-systems-with-openssh_securing-networks[Using secure communications between two systems with OpenSSH].
+====