Correct answer - "ECS_ENABLE_TASK_IAM_ROLE" : ECS_ENABLE_TASK_IAM_ROLE=true Enables IAM roles for
tasks for containers with the bridge and default network modes.
Incorrect:
"ECS_AVAILABLE_LOGGING_DRIVERS" - Applies if you are not using the Amazon ECS-optimized AMI (with
at least version 1.9.0-1 of the ecs-init package) for your container instances
"ECS_ENGINE_AUTH_DATA" - Required for private registry authentication.
"ECS_CLUSTER" - These are environment variables that can be passed to the container instance at
launch through Amazon EC2 user data