change 5XX Alarm to ELB (rather than backend) and codify NoHealthyInstancesAlarm#425

Merged

twrichards merged 1 commit intomasterfrom change-5XX-alarm-to-be-on-ELB

Feb 24, 2020

+62

Commits on Feb 21, 2020

5XX & NoHealthy alarms are in AWS Console, but not codified in cloudformation. Also changing the 5XX alarm to be both ELB AND backend to catch timeouts etc (unresponsive backend)
twrichards
committed