ReplaceEnvVars updates every container definition with updated env vars as a result of the deploy This runs through the env vars and replaces the standard env vars with the updated values.

Explanations provides plain-english explanations for a task status See https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task-lifecycle.html.

See elbv2types.TargetHealth.Reason and elbv2types.TargetHealth.TargetHealthReasonEnum.