Merge pull request #103923 from skopacz1/OSDOCS-14725_2

OSDOCS-14725: adding text about new install feature

Author: michaelryanpeter

installing/overview/index.adoc

@@ -58,3 +58,5 @@ include::modules/supported-platforms-for-openshift-clusters.adoc[leveloffset=+1]
 * See xref:../../installing/overview/installing-preparing.adoc#installing-preparing[Selecting a cluster installation method and preparing it for users] for information about choosing an installation method and preparing the required resources.
 
 * link:https://access.redhat.com/labs/ocpnc/[Red Hat OpenShift Network Calculator] can help you design your cluster network during both the deployment and expansion phases. It addresses common questions related to the cluster network and provides output in a convenient JSON format.
+
+* xref:../../installing/installing_with_agent_based_installer/installing-ove.adoc#installing-ove[Installing a cluster without an external registry]

modules/installation-overview.adoc

@@ -12,6 +12,8 @@ The {product-title} installation program offers four methods for deploying a clu
 * *Interactive*: You can deploy a cluster with the web-based link:https://access.redhat.com/documentation/en-us/assisted_installer_for_openshift_container_platform[{ai-full}]. This is an ideal approach for clusters with networks connected to the internet. The {ai-full} is the easiest way to install {product-title}, it provides smart defaults, and it performs pre-flight validations before installing the cluster. It also provides a RESTful API for automation and advanced configuration scenarios.
 
 * *Local Agent-based*: You can deploy a cluster locally with the Agent-based Installer for disconnected environments or restricted networks. It provides many of the benefits of the {ai-full}, but you must download and configure the link:https://console.redhat.com/openshift/install/metal/agent-based[Agent-based Installer] first. Configuration is done with a command-line interface. This approach is ideal for disconnected environments.
+** Additionally, you can deploy a cluster without an external registry, using self-contained installation media that also provides a simplified user interface similar to the {ai-full} during on-premise installations.
+For more information, see "Installing a cluster without an external registry".
 
 * *Automated*: You can deploy a cluster on installer-provisioned infrastructure. The installation program uses each cluster host's baseboard management controller (BMC) for provisioning. You can deploy clusters in connected or disconnected environments.