readme update

Author: katzy687

generic-orchestration-samples/setup_set_user_mail_on_apps/readme.MD

@@ -3,12 +3,14 @@ This is sample script for getting user email and updating config parameter on ta
 
 ## To use
 Set the following attribute on Generic Attribute Family
-`Update Mail`
-  - boolean, default false
+- `Update Mail` (boolean, default false)
 
-App param should be the following:
-`USER_MAIL`
+App param on app and in script should be the following: `USER_MAIL`
 
 Upload script as setup, python 2 or 3 both fine, and replace setup on target blueprint.
 
-Note in main.py how default config is disabled and this is replacing it.
+Note in main.py how default config is disabled and this is replacing it.
+
+For info on syntax to collect variables inside script see examples:
+- [dev guide](https://help.quali.com/Online%20Help/0.0/Portal/Content/DevGuide/Config-Mng/Custom-Scripts.htm?tocpath=The%20CloudShell%20DevGuide%7CDeveloping%20Configuration%20Management%20Scripts%20for%20Apps%7CCustom%20Script%20Development%20for%20Apps%7C_____0)
+- [usage example](https://github.com/QualiSystemsLab/App-Configuration-Demo-Scripts/blob/master/print_email_param.sh)