Unlike most websites, which conceptually are typically places for people to consume information, and perhaps share back thoughts or content for others to consume — "Websites are conversations" — the Resolving Door project embodied the user experience characteristics of a web application. That is, it's a website in that it has a URL and can be accessed in a browser, but its purpose is to be a tool to help the user do something rather specific.
In this case, the site's purpose is to provide the means for University of Colorado students to ask questions and post answers.