Publish artefacts to well-known public locations

[paullatzelsperger]

WHAT

To keep up the conventions of OSS projects we should publish our artefacts to publicly accessible and well-known locations, specifically:

• Docker Images -> hub.docker.com
• Maven Artefacts -> MavenCentral (and OSSRH Snapshots)
• Helm Charts -> ArtifactHub, and the TractusX Repo
• OpenAPI Specs -> SwaggerHub

WHY

OSS artefacts should be accessible to everyone without the need to authenticate or provide credentials.

FURTHER CONSIDERATIONS

For every artefact there are certain aspects to consider, for example Maven artefacts need to be published through an Eclipse Jenkins instance.
Docker images must come with a Notice, which must also be available on DockerHub, etc.

This issue serves as umbrella issue, to track several subtasks:

• Setup and implement publishing Docker images to DockerHub #164
• Setup and implement publishing Maven artefacts to MavenCentral and OSSRH #166
• Setup and implement publishing Helm Charts to ArtifactHub
• Setup and implement publishing OpenAPI files to SwaggerHub #295