Add a Readme and license notice to all secureCodeBox related DockerHub Repos #474

📚 Documentation Issue

Where to find the issue

All secureCodeBox related DockerHub repositories didn't have a Readme description and licence notice so far or otherwise it's outdated :(

Describe the issue

As a DockerHub User I would like to find a Readme description for each secureCodeBox repository which describes the docker image with all informations needed, especially the licence notice.

Suggested change

There is a useful GitHub action that can be used for updating the Readme for each Repo: https://github.com/peter-evans/dockerhub-description

I would suggest to add this action to our pipeline and combine it additionally with the already working helm-docs action. We can use the helm-docs features to render specialised dockerHub Readme files which then can be published by the GH action mentioned above.