Merge pull request #54 from Xento/main

Implement Spoolman url support for spools

Merge pull request #55 from Xento/optimize-workflow

- Image version is now fetched from release tag
- Image gets updated, when release is updated
- exact tag is checked out to build image

Update __version__.py

Update README.md

Merge pull request #30 from Xento/docker-image

Update GithubActions

Bump version to 0.1.6