feat: NET-85: document the --upload-bundle feature

Author: nazarewk

public/docs-static/img/troubleshooting-client/ui-bundle-success.png

@@ -106,7 +106,54 @@ names. Adding the `-S` flag will add system information like network routes and
 netbird debug bundle -AS
 ```
 
-This will output the path of the generated file, which can be accessed with administrative privileges.
+This will output the path of the generated file. The output file is owned by and can only be accessed by the user
+NetBird is running as, by default it is: `Administator` on Windows, `root` on MacOS/Linux or the operating system's
+equivalent.
+
+### Debug bundle uploads
+
+<Note>
+New in version `0.43.1`.
+</Note>
+
+Without local administrative privileges you can still share the debug bundles with us
+by using the `-U` / `--upload-bundle` flag.
+It will securely upload the debug bundle to our servers for access by the NetBird support team.
+
+```shell
+netbird debug bundle -AS -U
+```
+
+This will output an `Upload file key`, which is effectively a random filename in our internal storage system
+and can be safely shared with us through insecure channels such as GitHub Issues or Slack.
+
+```text
+> sudo netbird debug bundle -U
+Local file:     
+/tmp/netbird.debug.2611377582.zip
+Upload file key:
+1234567890ab27fb37c88b3b4be7011e22aa2e5ca6f38ffa9c4481884941f726/12345678-90ab-cdef-1234-567890abcdef
+```
+
+### Debug bundle uploads with GUI
+
+<Note>
+New in version `0.43.2`.
+</Note>
+
+You can also use the GUI `Settings` > `Create Debug Bundle` wizard to upload the bundle:
+
+<p>
+    <img src="/docs-static/img/troubleshooting-client/ui-settings.png" alt="service-user-overview" className="imagewrapper-big"/>
+</p>
+
+<p>
+    <img src="/docs-static/img/troubleshooting-client/ui-bundle-wizard.png" alt="service-user-overview" className="imagewrapper-big"/>
+</p>
+
+<p>
+    <img src="/docs-static/img/troubleshooting-client/ui-bundle-success.png" alt="service-user-overview" className="imagewrapper-big"/>
+</p>
 
 ### Debug for a specific time