Add information about computing for DESC to documentation.

[eacharles]

We should either links with information about computing resources and environment to this page:
https://github.com/KIPAC/BootCamp/blob/master/docs/desc.md

Or edit this page to point at a place to get that information:
https://github.com/KIPAC/BootCamp/blob/master/docs/Getting_Started.md

[jessmuir]

Sorry it's taken me a while to respond to this! Unfortunately I'm not active in DESC so am unfamiliar with DESC computing infrastructure. I'm also locked out of my DESC confluence account so I'm also limited in my ability to look up and share onboarding info from their website. (This reminds me that I have to send some follow-up emails to sort that out)

[eonadler]

I'm also practically inactive as far as DESC is concerned. I'm not sure if @sibirrer is, but if not let's punt this to someone who is more directly involved.

[eacharles]

Ok, I've asked Heather to take a look.