Minimum docker-compose version and ability to change port numbers

[xverges]

Would there be problems with upgrading the docker-compose required version to 1.12.0+? This would allow the use of the 2.1 docker-compose format, that would allow to use environment variables with default values for the port numbers https://docs.docker.com/compose/compose-file/compose-file-v2/#variable-substitution

I understand that the same could be achieved from setup.sh, but I think that changing it from the different docker-compose files would make the defaults obvious while allowing a more flexible deployment

[uschtwill]

Sure thing! Care for a PR?

[uschtwill]

^^