Add info around argo token

sreez-showcase/app-config.yaml

@@ -77,6 +77,9 @@ proxy:
     secure: false
     headers:
       Cookie:
+        # Set this variable by using this command
+        # argocd --server argocd-server-sreez.apps.oc-med.wk.nt.local:443 --insecure account generate-token --account backstage
+        # Use the appropriate account as configured in your argo-cm deployment ConfigMap
         $env: ARGOCD_AUTH_TOKEN
   ### Example for how to add a proxy endpoint for the frontend.
   ### A typical reason to do this is to handle HTTPS and CORS for internal services.