The source is open[0], and my stack is currently SQLite, Sveltekit, and Fly. I use Cloudflare for my media, and workers that handle the Partykit real-time syncing (which additionally uses YJS for conflict resolution and syncing).
I have a few dozen paying users at this point, but mostly this is a labor of love that scratches a specific itch I've had myself. Right now I'm working on touch screen controls to support some large-format touchscreens I'm trying to source.