I'm still waiting to see when that Century Link acquisition is going to have any effect on Appfog. Hell, they still do not support node 0.10.x and 0.10 stable was released six months ago. I actually have the same issue with Azure websites, the newest version they support is 0.8.x, while Heroku has up to 0.10.15
Since this is Docker-based, it sounds like it will support any version of Node that you'd like. If you want to run on whatever's on master, it should be possible.