Respond with index.html to directory request on nginx serving rails app

How can I make nginx or passenger respond with the index.html contained in the corresponding directory requested? For example I have a folder called media inside my public directory on my rails app, I want nginx to serve public/media/index.html when mysite.com/media of mysite.com/media/ is requested. I tried setting index index.html; inside my server directive in nginx conf, but it stopped serving my Rails app. I guess it's really simple I just co开发者_开发问答uldn't find the solution on my own.