If you don't already have an Amazon Web Services (AWS) account, you should sign up for one at http://aws.amazon.com/; if you are new to AWS, then you will be eligible for their free tier http://aws.amazon.com/free/.
I would recommend reading through Amazon's getting started guide if you are unfamiliar with AWS before working through this section of the chapter; you can find the guide at http://docs.aws.amazon.com/gettingstarted/latest/awsgsg-intro/gsg-aws-intro.html.
The AWS driver is like the Digital Ocean driver in that it has some sensible defaults, Rather than going into too much detail about how to customize the EC2 instance launched by Docker Machine, we will stick with the defaults. For AWS driver, these are as follows:
amazonec2-region = us-east-1 (North Virginia)
amazonec2-ami = ami-fd6e3bea (Ubuntu 16.04)
amazonec2-instance-type = t2.micro
amazonec2-root-size = 16GB
amazonec2-security-group = docker-machine
Please note, if amazonec2-security-group does not...