title: Need explanation for Docpad persistence
body: <p>I am pretty confused with the architecture behind how data is persisted in Docpad.  From blogs and forums, I got to know in-memory (and/or out directory) is used for generated contents.  But one of the selling points of Docpad is "completely file based".  From the sound of it, hosting it on Heroku or any ephemeral file system doesn't seem logical.  Can anyone give some explanation/clarification?</p>