Semantic versioning please

[jeroenrnl]

The docker image on hub.docker.com is not semantically versioned (https://semver.org/). There is a version 1.1 that is 2 years old, a version 1.0 that is 3 years old and version 1 gets updated with every change. This breaks my automatic updates, as it will always want to go back to v1.1. I'm now following "latest", but that's not very practical as it get updated with every commit.