We have a root level Dockerfile in the tools repo which automatically builds at Docker Hub but it's the nfcore/base one that is used as a base for pipeline images: https://hub.docker.com/repository/docker/nfcore/base

It would be good to also write a Dockerfile that builds the nf-core/tools package into an image that people can use (yes I know, it should be on BioContainers too, but doing docker run nfcore/tools is nicer).

• Build a Dockerfile for tools which has as small a footprint as possible
• Organise Dockerfiles into directories so we can have both base and tools
• Remove DockerHub automated builds
• Write GitHub Actions builds + push to DockerHub
• Write some documentation