Publish Images on DockerHub

[axdotl]

Feature Suggestion

Publish Docker images on DockerHub (under https://hub.docker.com/orgs/staffbase) instead of our own registry.

Possible Implementation

• Adjust workflow

Context

[ricoberger]

I would close the issue, because the image is available at https://hub.docker.com/r/staffbase/yamllint-action since some time.