I know there is Node.js and Rhino, amongst other platforms to run server side JS. Though, we can only afford a shared server, since a VPS is much more expensive, and normally shared servers do not provide such tools. We need to run some cron jobs which by default are run by the server, and our core functions are purely JS without interaction with the browser/client.
Is there then a simple way of running server side JS, without the need for installing server side specific SW?