Documentation: suggested AWS architecture / guidelines

[donsizemore]

A handful of community members have asked, some more recently than others, for a sample Dataverse architecture in AWS.

I've seen a number of versions of the diagram on the installation/preparation page in the guides, but today someone asked for AWS recommendations, preferably with redacted/suggested TerraForm/CloudFormation examples. I had started a Google Doc at some point (it's now woefully out of date) but since AWS is the target platform for many installations, such an addition to the "Preparation" page might be helpful to new community members.