Rails app on server

I have a domain

www.example.com which has php script running

hosting has rails support through ssh

so with ssh i have created a testapp in public_html so inside testapp all related files are created then bundle installed then rail s it shows

[~/public_html/testapp]# rails s => Booting WEBrick => Rails 3.2.0 application starting in development on => Call with -d to detach => Ctrl-C to shutdown server

but where is it running? my hosting says to create a subdomain and point to public folder i done the same

but it was not working

welcome page is displayed

but all other pages shows internal server error

actually how to host a rails app in real website like www.exaple.com or test.example.com

Try Heroku instead

Start here: http://rubyonrails.org/deploy/