Thanks for the reply. I don't have a Raspberry Pi. I'm using Container Station on my QNAP NAS, using the only MC ARM build on Docker Hub (27.0.22). So, everything you've written is foreign language to me, but I'm willing to try and learn something new if it's the only way I can get my system up and running the way it was working before I ran into the insurmountable transitional MC28 licensing conundrum. Is buying a Raspberry Pi the only way for me to build the image, or might there be apps available on my QNAP to do it?
Yes, when accessing MC via a web browser, it does have the graphic artifacting and isn't pretty to look at, but it's perfectly useable for setting the preferences and doing some custom tagging. Once that's all done, I use JRemote2 and it works like a charm. I much prefer this setup, as I'm only using MC as a hi-fi music server and can do so with a minimum of devices (no need to power up another computer as the middle man). I can run a basic ARM NAS fitted with SSDs silently, as the power usage isn't enough to break a sweat. What I love about it, is you wouldn't know the NAS is there. To use, it feels like a direct relationship between JRemote2 and my receiver.
The docker image I'm using was made by a user named Merkulov1979, based upon one of your images and is the sole MC image for ARM on Docker Hub, uploaded 7 months ago. Looking at the number of downloads, it seems my setup may be one of the least trodden paths among the MC community. Right now there is no available option for users such as myself to license MC, and there's no guarantee Merkulov1979 will ever make another docker image. Apologies for the long-winded response, but if there's any chance you could please compile an ARM version and put it on Docker Hub, that would be a life saver. Even if it's labelled as experimental/beta/ugly, I'm sure others in my position will be as eternally grateful as I will be.