Basically, you need to delete index.html in public folder before
starting to develop.
We don't use it. It's just there to see if Rails is running fine and
show "Welcome aboard" message.
By default, Rails directs to the index.html file in the public folder
unless you add map.root :controller => "something"... in the routes.rb
file
so if you haven't changed that, all you have to do is edit the
index.html file the way you want it. if the app automatically
redirects to the controller, check in your routes.rb file.