bug#51505: Request for official docker image on dockerhub

[Jacob Hrbek]

Please set up an official docker image on dockerhub (e.g. https://hub.docker.com/_/debian) i wanted to use docker to test GUIX configuration, but i can't define a dockerfile for it since `FROM scratch` can't fetch remote tarball without using `ADD` from a local file (which is not an option in the development environment) so i had to resort to a 3rd party alpine + guix (https://raw.githubusercontent.com/bmpvieira/Dockerfiles/master/guix/Dockerfile).

... also need an official docker image for WoodpeckerCI to handle CI/CD for my systems to avoid deploying broken configuration.

See howto on

https://docs.docker.com/develop/develop-images/baseimages/

The following should be sufficient:

$ wget

https://ftp.gnu.org/gnu/guix/guix-binary-1.3.0.x86_64-linux.tar.xz

$ docker import - guix-binary-1.3.0.x86_64-linux.tar.xz

Or:

```dockerfile

FROM scratch

MAINTAINER Jon Doe Von GNU <user@domain.tld>

# Add the tarball from

https://ftp.gnu.org/gnu/guix/guix-binary-1.3.0.x86_64-linux.tar.xz on the image

ADD ./guix-binary-1.3.0.x86_64-linux.tar.xz /

ENTRYPOINT [ "/bin/sh" ]
```

-- Jacob "Kreyren" Hrbek

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