Create readme.md

Notes for installation or Implementation

Author: mandeepkaran

Catalog Client Script/CustomAlert/readme.md

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+These scripts helps you to create custom popup easily. follow the below steps to implement it on your instance.
+
+Steps
+1. Create UI page with name "custom_alert_box"
+2. Copy HTML section from customn_alert_box.js to HTML field of UI Page
+3. Copy Client Script section from customn_alert_box.js to Client Script field of UI Page
+4. UI Page is ready to be used.
+5. Refer the "custom_alert.js" to create client script or catalog client script to alert HTML messages or links in custom alert format.
+6. Refer the screenshots folder for quick look.