• Install Volumio the normal way.
• Set Volumio to accept ssh connections in the developer settings.
• Open a ssh session to volumio.local and run the Pi-hole install script.
• Open /etc/lighttpd/lighttpd.conf and set these values:
  server.port = 8080
server.errorlog = "/tmp/lighttpd_error.log"
accesslog.filename = "/tmp/lighttpd_access.log"
• Reload the lighttpd settings with sudo service lighttpd reload or reboot the Raspberry Pi.
• Go to the Pi-hole web interface at http://volumio.local:8080/admin/
• (Optional) Set a default web page at the web root:
  cd /var/www/html/
cp index.lighttpd.orig index.html
  Or set your own index page.

And while you are at it, stop the dhcp-daemon and delete the secondary IP address.

Link

https://www.cyberciti.biz/tips/installing-and-configuring-lighttpd-webserver-howto.html