rewrite to root

[AL]

hi,

I have written rewrite rules for my couchapp, and now I can access it at
    http://domain.org/db/_design/doc/_rewrite

However I'd like to make it accessible at

    http://domain.org/.

I remember having done that before but can't remember how... How can I 
do this again? I'm using nginx as a proxy, in case it helps...

Thanks a lot,

Alex