Remove the kappnav prompt from the install script

scripts/README.md

@@ -15,6 +15,8 @@ Retrieve the [installation scripts from our documentation repository](https://gi
 
 ## Installation
 
+Review the installation script for any optional components that you wish to enable.  Components can be enabled by passing the appropriate environment variable to the script, or by editing the script.
+
 As a `cluster-admin`, execute the installation script, replacing `my.openshift.master.default.subdomain` with your subdomain:
 ```
 openshift_master_default_subdomain=<my.openshift.master.default.subdomain> ./install-kabanero-foundation.sh

scripts/install-kabanero-foundation.sh

@@ -9,6 +9,9 @@ set -Eeox pipefail
 # Branch/Release of Kabanero #
 KABANERO_BRANCH="${KABANERO_BRANCH:-0.2.0-rc.1}"
 
+# Optional components (yes/no)
+ENABLE_KAPPNAV="${ENABLE_KAPPNAV:-no}"
+
 # Kserving domain matches openshift_master_default_subdomain #
 # openshift_master_default_subdomain="${openshift_master_default_subdomain:-my.openshift.master.default.subdomain}"
 if [ -z "$openshift_master_default_subdomain" ]
@@ -17,12 +20,6 @@ then
   read openshift_master_default_subdomain
 fi
 
-# Query for optional components
-if [ -z "$enable_kappnav" ]
-then
-  echo "Would you like to configure KAppNav (yes/no)?"
-  read enable_kappnav
-fi
 
 ### Istio ###
 
@@ -133,7 +130,7 @@ do
 done
 
 # Install KAppNav if selected
-if [ "$enable_kappnav" == "yes" ]
+if [ "$ENABLE_KAPPNAV" == "yes" ]
 then
   oc apply -f https://raw.githubusercontent.com/kabanero-io/kabanero-operator/${KABANERO_BRANCH}/deploy/optional.yaml --selector=kabanero.io/component=kappnav
 fi