Create README.md

Author: lauri457

Modern Development/Service Portal Widgets/Custom attachment variable/README.md

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+# Attachment variable widget
+
+This widget lets you use the oob attachment picker from the oob catalog item widget as a custom type variable giving you more control over attachment behaviour, you can for example use ui policies to hide and show the attachment picker. 
+
+## Usage example
+
+Create new widget [sp_widget]
+Copy template.html in the Body HTML template field
+Copy controller.js in the Client controller field
+Add custom type variable using newly created widget positioned as last variable
+Set hide attachment for catalog item as true
+Open cat item in portal and adjust widget as needed