My project seems to fit a couple different categories. Which do I chose to submit?

I wrote a wedding website which has a Content Management System, built with JavaScript. However, there are a few PHP files which are accessed when posting data only. I am not sure what category to submit it to. It runs on a front end database, so it’s a bit of a “plug in and play”, REST application.

To help explain what I wrote, I have a video under 5 minutes here:

Any suggestions on where this belongs for submission?