Include screenshot. Request from solutions engr.

Author: mjang

content/nginx-one/how-to/nginx-configs/add-file.md

@@ -44,6 +44,8 @@ You can use the NGINX One Console to add a file to a specific instance. To do so
 
 You now have multiple options, described in the sections which follow.
 
+{{< img src="nginx-one/images/add-file-to-config.png" alt="Add/upload a new configuration, SSL, or other file" >}}
+
 ### New Configuration File
 
 Enter the name of the desired configuration file, such as `abc.conf` and select **Add**. The configuration file appears in the **Edit Configuration** window.