Thanks Ian that sounds great. I guess my only concern is:
"Codio is intended for development purposes and is not a production platform. As Boxes operate on shared servers, we will rapidly suspend accounts that generate sustained high levels of load."
My app is not large and only has a few hundred users with a low concurrency so don't think the load will be high. Do you have a definition of high load? Just can't afford a vps and codio for a free hobbyist site but keen to support a great product.