Can I create a custom HTML page accessible from a client browser without making a channel?

I’d like to be able to allow users to go to a custom URL from their browsers while connected to the Kolibri (e.g. On other servers I’ve worked on in the past, I can add such a page by ssh-ing into the device, adding my HTML file into the www directory, and then accessing it freely from the client. I’m using a Raspberry Pi 0w to run my Kolibri server, and I found the www directory at /var/www, but I can’t figure out how to access HTML files I create there.

For example, I’d love to be able to create mypage.html in the www directory of the RPi, then go to from my client browser and see it, but all I get is an error when I try to access that page.