Nginx reverse proxy multi upstream (multiples sites)

[cloud devops]

When I make http://panel.cloud.com I have the first site which is on the
first stream
Si I make http://panel.cloud.com/panel, in this case it was redirected to
the home page of the second site as the configuration is done but i can not
navigate on the site because the URL is changed.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,257950,257952#msg-257952