Thanks for the quick responses! I'll certainly try to test my application running one of these builds for as long as possible before deploying.
On that note - I successfully built armbian using the dev kernel and installed it, and docker, which is now Docker is working; I also tested the nightly dev build and it ran Docker also, but the login message was very clear about not using it in a production system.
What would be the recommended way of getting a Docker compatible kernel? I.e. safest path for most vanilla, repeatable, process, facilitating future upgrade?