Join the 'official' docker library

[J0WI]

https://github.com/docker-library/official-images#contributing-to-the-standard-library

Here are some goodies:

• automated updates and rebuilds
• more visibility/trust on DockerHub
• multiple architectures
• security scans

[cpanato]

thanks @J0WI i will check that!

[J0WI]

@cpanato since there are some planned breaking changes for 6.0 anyway this might be an ideal time to move to the library.