I’m kinda drunk given its New Year’s Eve but I am 99% sure I could find and implement a QR code based authentication method in short order if I tried.
Plex does it, everyone else does it, in this day and age there’s no reason why you can’t generate a token and then a uri and then a QR code if you are able to handle the rest of it.
Again, how is it on Apple or any vendor for that matter, to be on the hook for them?
if they really wanted they could use Apple based oauth
For arbitrary text input id ask you to point at any other remote / UI that handles this limitation better.
Dockers documentation is actually pretty good, I’d recommend taking a look at it because it’s written really well and can be used as a decent primer on learning to read documentation.
I would recommend learning docker / containerization. For your use case you likely won’t see a big benefit HOWEVER it is a good technology to know.
As far as the “why” you’d use it there are too many to list but for your use case the why I’d argue is “just so you know how to do it” and you’ll come up with your own why along the way.
Simplest why beyond “it’s a good technology to know” is that updating an app is as simple as pulling a new container and relaunching it.