New User Sites Configuration

Hello,

I'm moving to Nginx from Apache so I can try an application called Paperwork from Two Stairs.

On there example sites configuration file it has:

server {
listen 80;
# listen 443 ssl;

root /var/www/paperwork/frontend/public;
index index.php index.html index.htm;


If I also want to run wordpress on the same site at /var/www/wordpress and Joomla at /var/www/joomla how do I set this up?

So someone can type host.com/wordpress or host.com/joomla or host.com/paperwork

Sorry for the simplistic question and thanks in advance.

Peter