create a notification/email when the site goes down

[skorasaurus]

it'd be nice to set up an email to opencleveland's email when the site goes down; the site goes unexpectedly down once in a really great while; it last did 2-3 weeks ago; I didn't check the logs to see why; but we can investigate that as well.

[pkoepke]

https://uptimerobot.com/ is a free tool for this.