OSSMDOC-363: Add admonition to overview of Installing the Operators topic

Author: rh-tokeefe

service_mesh/v2x/installing-ossm.adoc

@@ -8,6 +8,11 @@ toc::[]
 
 To install {ProductName}, first install the required Operators on {product-title} and then create a `ServiceMeshControlPlane` resource to deploy the control plane.
 
+[NOTE]
+====
+This basic installation is configured based on the default OpenShift settings and is not designed for production use.  Use this default installation to verify your installation, and then configure your service mesh for your specific environment.
+====
+
 .Prerequisites
 * Read the xref:../../service_mesh/v2x/preparing-ossm-installation.adoc#preparing-ossm-installation[Preparing to install {ProductName}] process.
 * An account with the `cluster-admin` role. If you use {product-dedicated}, you must have an account with the `dedicated-admin` role.