feat(docker): add dockerfile

[reneleonhardt]

Features

• Add multi-platform Dockerfile
• Image is used as a store for maximum convenience

COPY --from=opensuse/catatonit --chown=65534 /catatonit /

Missing

• GitHub workflow to build the multi-platform image and publish it

Fixes #30

[tacerus]

Shouldn't an openSUSE project ship with an openSUSE based container? I also think ideally this would be built in OBS and offered as an official image via registry.opensuse.org.

[reneleonhardt]

It's just a working example after I saw the open feature request.
It's not published anywhere, you could just merge and change it for example.

[ChristianCiach]

Shouldn't an openSUSE project ship with an openSUSE based container?

The image seems to be designed to be used as part of a docker multistage build to COPY the static binary out of this image into your own image. It does not seem to be designed to be used as a base image, so adding any OS base layer (openSUSE or anything else) would just add unnecessary bloat that nobody needs. Also, the image would need to be regularly updated to not flag vulnerability scanners.

For these reasons, I strongly prefer this image to be based on scratch (aka no base at all). This is exactly what I'm currently looking for.

@tacerus You probably saw the FROM alpine in the first line of the Dockerfile and immediately assumed that the final image would be based on Alpine. This is not the case. The PR author only uses Alpine to build the static binary. This could be OpenSUSE for all I care. The real base of the final image is FROM scratch further below in the Dockerfile.

[ChristianCiach]

@tacerus Assuming this PR would be accepted, would you consider accepting a follow-up PR to publish the image (only containing the static binary and nothing else) to ghcr.io of this github project? This would effectively just be an additional Github release, but as an image.

[tacerus]

I'm not a maintainer of this repository, I don't have any power to accept or decline your proposals, sorry. :)