adding changes

documentation/modules/ROOT/pages/04-workshop.adoc

@@ -9,6 +9,16 @@ In the workshop, we will be deploying an application OsToy to managed openshift
 
 == Installing the workshop environment
 
+These managed openshift clusters are required for the workshop:
+
+- Two Red Hat Openshift Service on AWS (ROSA) clusters(one for dev and second for prod)
+- One Azure Red Hat Openshift (ARO) cluster
+- One Openshift Dedicated on GCP cluster
+
+Once clusters are ready, you can move to "Delivering the workshop" part.
+
+If you are a Red Hatter, you can follow the below steps to get these above clusters created. 
+
 * Login to https://demo.redhat.com/catalog and create the ROSA and ARO openshift clusters:
 
 - Two Red Hat Openshift Service on AWS (ROSA) clusters(one for dev and second for prod) using this link https://demo.redhat.com/catalog?search=aws&item=babylon-catalog-prod%2Fsandboxes-gpte.rosa.prod[ROSA]