Update readme.md

Author: JohanDC-1999

Server-Side Components/Background Scripts/Duplicate Finder/readme.md

@@ -1 +1,24 @@
-# Contribution
+## ServiceNow Duplicate Record Finder
+A simple server-side script for ServiceNow that finds and reports on duplicate values for any field on any table. It uses an efficient GlideAggregate query and formats the results into a clean, readable report.
+
+### How to Use
+This script is designed to be run in **Scripts - Background** or as a Fix Script.
+1. Navigate: Go to **System Definition > Scripts - Background** (or type sys.scripts.do in the filter navigator).
+2. Copy Script: Copy the entire contents of the script.js file.
+3. Paste and Configure: Paste the script into the "Run script" text box. At the bottom, modify the function call to target your desired table and field:
+  ```js
+  // CONFIGURE YOUR QUERY HERE
+  findDuplicates('your_table_name', 'your_field_name');
+  ```
+  For example, to find duplicate email addresses in the User table:
+  ```js
+  findDuplicates('sys_user', 'email');
+  ```
+  To find incidents with the same short description:
+  ```js
+  findDuplicates('incident', 'short_description');
+  ```
+
+
+4. Run Script: Click the "Run script" button. The results will be displayed on the screen below the editor.
+