Use a different base distro for AWS AMIs

[wesharper]

Description
Change the default base linux distribution for AWS AMIs to a modern base image of Ubuntu or Amazon Linux. This would allow for Amazon's EC2 Instance Connect out of the box and allow for easy SSH directly from the AWS cloud console without any additional config. As far as I can tell, it doesn't seem like Debian is strictly necessary and that just dropping the existing config into a different distribution should just work out of the box.

Basic example
The docs could be updated to have users log in via the EC2 instance connect console and manual creation of SSH keys in AWS would be unnecessary, as the auto-generated keys would be sufficient.

[brunoocasali]

If we could make any type of improvements by doing that, we definitely should do it! Thanks for the suggestion, PR's are welcome!