Consider docker pre-built images

[jzohrab]

With docker pre-built images pushed to docker hub, users with docker would be able to start using Lute with just a few clicks:

• get the .env file, and the docker-compose.yml. Then

$ mkdir lute
$ cd lute
$ # cp the .env file and compose file to this dir, editing them if needed
$ docker compose up

I don't feel any code changes are needed. V2 (soon to be merged into develop) already has the various code changes in place needed for the image to work well. ... But there may be other requirements as well for this to work on all client machines that I'm not aware of!!

Ref different builds for different architectures (https://docs.docker.com/build/building/multi-platform)

[jzohrab]

V2 has been launched, and the release process could create a new Docker image. The only thing I'm not sure of is how to build containers for multiple architectures. I have read that it's possible, but without knowing how to do it, and without environments to test, I'm reluctant to invest time here. Perhaps others more knowledgeable than I can make some suggestions.

[jzohrab]

See PR #64 for some additional notes.

[jzohrab]

Handled in Lute v3, good enough for now!