As part of the CloudFormation template, create a LogGroup and configure
task with awslogs log-driver. Also create a dedicated IAM Role, with
AmazonECSTaskExecutionRolePolicy. This one will later be fine-tuned to
grant access to secrets/config and other AWS resources according to
custom extensions
close#42
Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>