Lets say my rails app is divided into projects, such as www.mydomain.com/projects/1/articles/22
And then lets say I've allowed (unique) project names to be used instead of numbers such as www.mydomain.com/projects/foo/articles/22
Now, what I really want to do is make the project look like a subdomain, so in fact it'd look like
foo.mydomain.com/articles/22 etc
And when a user signs up a new project, the app will automatically recognize bar.mydomain.com without DNS propagation or restarting the server.
Can I do this on your hosting service? If so, how? :)