This section is used to indicate that the server hosts production-ready versions of your sites,
and for all sites on the server, changes all three previous items to a secure setting: debugging
and tracing are disabled, and error messages are accessible only to local users.
To make this change, you need to be logged in as an Administrator on your system. Also, be
sure to make a backup copy of the file first. Because it serves as the root configuration file
for all your ASP.NET websites, you don’t want to mess up this file