This is one of the benefits of the flexible hosting environment that we provide. The "Proxy Port" application type gives you the ability to serve up nearly any web application that can serve HTTP on a network port.
This means you're always able to try something new - for example, if some new web app or framework were released today, you're able to install it and run it today without waiting for Opalstack to create an official installer for it or whatever.
How many other managed shared hosting providers will let you do that? 🙂