How to change the configuration file to deploy a rails app with apache? on a subdomain

I was given an url http://XXXXXX.XXXX.XXX/avrccalendar/ and was asked to deploy my rails app on it.

At the beginning, there was a static webpage index.html in the /www directory, which is nothing but a message and was deleted by me.

This is my first time to deploy a rails app and I set my .conf like this:

VirtualHost *:80>

ServerName http://XXXXXX.XXXX.XXX/avrccalendar

DocumentRoot /home/avrccalendar/calendar/public

RailsEnv production

/VirtualHost>

I set it up that way, because I think rails app creates dynamic content, thus I didn't put the app files in the /www directory. However, when I visit the website it still get the static webpage index.html.

I cannot find whers the configuration is that set the url to return that static webpage.

And i would like to know how I should set .conf to make it to visite my rails app.

I have already installed passenger. The environment is Ubuntu 14.04.

Any advice would be helpful. Thank you~!