getInstanceInfo improved readme

Server-Side Components/Background Scripts/Get Instance Info/README.md

@@ -1 +1,31 @@
-These are few scripts to run from Background Script editor to get the instance info.
+A background script that retrieves and displays essential ServiceNow instance information including IP address, node ID, and instance name.
+
+## Usage
+
+1. Navigate to **System Definition → Scripts - Background**
+2. Copy and paste the script content from `getInstanceInfo.js`
+3. Click "Run script"
+4. Check the system logs and info messages for the instance details
+
+## What It Does
+
+The script:
+1. Retrieves the remote IP address of the current transaction using `GlideTransaction.get().getRemoteAddr()`
+2. Gets the system/node ID using `GlideServlet.getSystemID()`
+3. Fetches the instance name from system properties using `gs.getProperty("instance_name")`
+4. Displays IP address and Node ID as info messages in the UI
+5. Logs the instance name to the system logs
+
+
+## Sample Output
+
+**Info Messages:**
+```
+IP Address: 192.168.1.100
+Node ID: node1abc123def456
+```
+
+**System Log:**
+```
+*** Script: mycompany-dev
+```