Why not use the tailnet address? There’s an option that gives you random words instead of an iPhone address and it works very well, at least for me. i I mean you still need to know the port but it’s less to remember. As for dashboard I use Homarr.

Webstudio + baserow could work and those are both open source

how technical are you?

You could probably use Notion as a backend and use Potion.so to make the website. Another route is Webstudio + a CMS like Hygraph or Strapi if you want to self host it.

I think this might even be doable on Ycode or Webflow.

At the end of the day what you want is a database with all the products and a relations between each other based on their features.