I've developed this site with the following goals:
This is a Rails site running on Passenger, with Apache in front and SQLite in back. I also have Node.js and MongoDB behind Apache, mainly to serve the JSON API used by the demos. Finally, there's an instance of Wordpress hosting the blog. It's also backed by SQLite.
The site is hosted on AWS, and in addition to coding the site itself, I've put significant effort into scripting the management of the AWS infrastructure, and developing an efficient build/deploy pipeline for publishing new releases. Vagrant has been a great help with that.
ops-bill-boyer.com contains the bulk of my ops-related code.