Spotify Maven Plugin is archived

[maciejwalkowiak]

https://github.com/spotify/dockerfile-maven recommended in this guide is not maintained anymore and the repository has been archived. I believe it should be removed from the guide to prevent folks from using outdated deps from the start.

[dsyer]

Do you have an alternative suggestion? My reading of the README is that the product is mature - i.e. stable and critical bug fixes will be applied - not unmaintained.