<jimpick>
I made a quick little Node.js proxy (using fastify) as an experiment to see if I could patch my package into the app-index and install it ... seems to work if I handcraft the /install url. I'm still not seeing my app under "Admin / Pre-installed apps" though. It probably needs to rescan.
<jimpick>
i figured out where to hack the scanning interval and i can see my app for a new user!