Devise and document process for dealing with social.coop problem resolution

It'd be nice to have a "what to do if social.coop is down" document for users, and tech people.

For instance I'd suggest we use our matrix channel as a place to drop and check who's noticed and whether it's being resolved.

https://riot.im/app/#/room/#SocialCoop:matrix.org

Also, so people can find it we should reference this in Loomio and elsewhere, specifically:

• https://www.loomio.org/socialcoop/ (main page)
• https://www.loomio.org/d/kGcPnWYO/social-coop-down-june-6-2018
• https://www.loomio.org/d/6V2tAIZa/issues