Upgrade JSS Server to latest version (10.5.0)

Going to be down
Issue start: 
Tuesday, July 10, 2018 - 5:10pm
Estimated resolution time: 
Tuesday, July 10, 2018 - 5:30pm
Who is affected: 
Mac users attempting to use Self Service to install optional software.
Affected in what way: 
You won’t be able to use Self Service while the server is upgraded. The outage is expected to last 15 minutes.
Try again in 15 minutes.
What happened: 
The server software is being upgraded to add more support features for Apple users.