> What we need is maybe an web-browser accessible hub where we can place or point to an app and quickly configure it to run on the server. SSH optional.

I love hearing this, because this is exactly what I'm building. Not quite there yet, but that's exactly the dream! We just posted a blog about setting up a home server and attaching it if you're interested https://kubesail.com/blog/microk8s-raspberry-pi/