chore: simplify Dockerfiles

[alecthomas]

Consolidates on a single Dockerfile for all primary services. Language-specific runners require a separate Dockerfile each in the form Dockerfile.runner-<language>. Build all of these with just build-docker <name>, eg. just build-docker runner-jvm.

Also adds a just list-docker-images, and updates ci.yml to build via a matrix using this.

Warning

In order to simplify the Dockerfiles this changes a bunch of environment variables , which might break due to downstream infra that set the old values.

[stuartwdouglas]

I think we also need to update the release workflows.

[stuartwdouglas]

Also the Justfile in ./deployments needs to be updated, as it was relying on the .test dockerfiles.

[alecthomas]

I think we also need to update the release workflows.

Already done :)

[alecthomas]

Also the Justfile in ./deployments needs to be updated, as it was relying on the .test dockerfiles.

Ah yep, will do that now.

Done

[alecthomas]

Also the Justfile in ./deployments needs to be updated, as it was relying on the .test dockerfiles.

Updated, but I'm not sure it's being exercised in CI (?), so it might need a manual check potentially.

[alecthomas]

Also the Justfile in ./deployments needs to be updated, as it was relying on the .test dockerfiles.

Updated, but I'm not sure it's being exercised in CI (?), so it might need a manual check potentially.

Mmm well some of the CI jobs are failing, so I guess that answers that question 😂

[stuartwdouglas]

Smoke Test Upgrade Path got broken by a different PR, so don't worry about that one. I can look at fixing TestKubeScaling tomorrow if you want.

[alecthomas]

Smoke Test Upgrade Path got broken by a different PR, so don't worry about that one. I can look at fixing TestKubeScaling tomorrow if you want.

Ah, kk. I think I have TestKubeScaling working, it was just some stupid stuff in the builds.

[alecthomas]

Mmm okay I spoke too soon; everything is working except TestKubeScaling :(