Interpolate fixes

Merge pull request #6 from blinkist/small_fixes_and_doc_cleanup

Small fixes and doc cleanup

Merge pull request #5 from blinkist/enable_disk_encryption

Enable disk encryption

+ iam role export

+ iam role discription, some 3rd party tools need to configure this d…

…escription

fix readme

Added autoscaling group metrics

Added iptables rule for blocking the EC2 Metadata service

Datadog launched in as ECS_SERVICE using daemon scheduler

Datadog implementation fix

Fixed datadog integration