create Acropalypse docker container

similar to https://git.sachsen.schule/schullogin-projekt-tools/spinx-typo3-documentation-renderer/

https://docs.gitlab.com/ee/ci/docker/using_kaniko.html

TODO

• Create Dockerfile for to run acropalypse
  • python alpine base image
  • entrypoint.sh which executes acropalypse script
  • target directory has to be mounted when running container
• Test Dockerfile -> image -> container locally with example images -> document in README
• Build image using kaniko -> push to schullogin registry
• Schullogin repo -> CI -> pull image -> run on whole repo