[all hosts] (Debugging) Add section about the debug versions of office.js (#5094)

* Add section about the debug versions of office.js

* Update docs/testing/debug-add-ins-overview.md

Co-authored-by: Sam Ramon <[email protected]>

---------

Co-authored-by: Sam Ramon <[email protected]>

Author: AlexJerabek

docs/testing/debug-add-ins-overview.md

@@ -2,7 +2,7 @@
 title: Debug Office Add-ins
 description: Find the Office Add-in debugging guidance for your development environment.
 ms.topic: overview
-ms.date: 12/21/2023
+ms.date: 03/20/2025
 ms.localizationpriority: high
 ---
 
@@ -80,6 +80,15 @@ There is no desktop version of Office for Linux, so you'll need to [sideload the
 
 To debug an add-in that is already in staging or production, attach a debugger from the UI of the add-in. For instructions, see [Attach a debugger from the task pane](attach-debugger-from-task-pane.md).
 
+## Versions of office.js for debugging
+
+There are debug versions of the Office JavaScript libraries. These versions are more human readable and easier to step through with a debugger. Use them when the Office JavaScript APIs aren't working as expected. Avoid using them when you publish and deploy your add-in.
+
+The debug versions are found at the following CDN locations.
+
+- Office JavaScript API library: `https://appsforoffice.microsoft.com/lib/1/hosted/office.debug.js`
+- Office JavaScript API (preview) library: `https://appsforoffice.microsoft.com/lib/beta/hosted/office.debug.js`
+
 ## See also
 
 - [Runtimes in Office Add-ins](runtimes.md)