Make docker simpler

[XRyu]

I would really love to just start and run this on my Synology - is it possible to autobuild a full container image for the entire application so no docker_compose is needed ? :)

[paschmann]

Hi @XRyu - I created a container image here, I tried it out on my Synology but it seems Docker does not support environment variables. Please test it out and let me know if it works, YMMV.

docker pull paschmann/changd:latest

[CausticD]

Depending upon the Synology device, this probably won't work because only an Arm64 build seems to have been made.