nginx.conf

#--------------------------------------------------------------------------
# PORT ALLOCATION:
#   - usr1 => 5001 to 5020
#   - usr2 => 5021 to 5040
#   - usr3 => 5041 to 5060
#--------------------------------------------------------------------------

server {
  listen       5001;
  server_name $hostname.internal.ac.uk;
  root /www/usr/www/usr1/Clinical/public;
  
  include proxies.conf;
}
 
#--------------------------------------------------------------------------

server {
  listen       5021;
  server_name $hostname.internal.ac.uk;
  root /www/usr/www/usr2/Clinical/public;

  include proxies.conf;
}

#--------------------------------------------------------------------------

server {
  listen       5041;
  server_name $hostname.internal.ac.uk;
  root /www/usr/www/usr3/Clinical/public;

  include proxies.conf;

#--------------------------------------------------------------------------

proxies.conf

# rewrite to home page for the cosmic site;
  rewrite  ^/$        /projects/clinic/  permanent;
  rewrite  ^/clinic$  /projects/clinic/  permanent;
  rewrite  ^/mp$      /projects/mp/index.html  last;

  location / {
    try_files $uri @proxy;
    access_log off;
    expires max;
  }
 
  location @proxy {
    proxy_set_header Host $http_host;
    proxy_set_header X-Forwarded-Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_pass       http://$hostname.internal.ac.uk:5042;
  }
}