Create readme.md

Author: acoumb

src/Umbraco.Cms.Integrations.Automation.Zapier/readme.md

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+# Umbraco.Cms.Integrations.Automation.Zapier
+
+This integration provides a dashboard interface that allows users to map content types with Zap triggers webhooks.
+
+When the content type gets published, the details of the configuration are looked up into the database and if a record is found, 
+will send a request to the Zap, triggering the matching actions.
+
+A Zap is an automated workflow that connects various apps and services together. Each Zap consists of a trigger and one or more actions.
+
+## Prerequisites
+
+Requires minimum versions of Umbraco:
+
+- CMS V8: 8.5.4
+- CMS V9: 9.0.1
+
+## How To Use
+
+### Authentication
+
+For this integration, the authentication is managed on Zapier's side. 
+
+When creating a Zap trigger, you will be prompted to enter a username, password and the URL for your Umbraco website.
+
+Then the Umbraco application existing in the Zapier marketplace will validate the credentials entered and return a message in case the validation fails.
+
+If you want to extend the security layer, you can also specify a user group that the user trying to connect needs to be a part of, by adding the following 
+setting in `Web.config`:
+
+```
+<appSettings>
+...
+  <add key="Umbraco.Cms.Integrations.Automation.Zapier.UserGroup" value="[your User Group]" />
+...
+</appSettings>
+```
+
+### Working With the Zapier Cms Integration
+In the _Content_ area of the backoffice, find the _Zapier Integrations_ dashboard.
+
+The dashboard is composed of two sections:
+* Content Properties - Zapier details and input fields for adding content configurations
+* Registered Webhooks - list of created content configurations
+
+Each content type can only have one webhook configuration attached. After a configuration has been added for a specific content type, the content type item gets removed from the input field, 
+and it can be restored by deleting the configuration from the database.
+
+The _Trigger Webhook_ action will send a test request to the Zap trigger, enabling the preview of requests in the Zap setup workflow.