Sync template image variants with devcontainers/images (drop bullseye, add Go 1.27)

[Copilot]

The scheduled Compare Templates against Images workflow flagged image tags that are referenced by templates but are no longer published by devcontainers/images. This syncs the affected templates with the currently published variants — dropping unpublished bullseye tags and adding the new Go 1.27 variants.

Changes

Removed unpublished bullseye variants from each template's options.imageVariant.proposals:

• debian — bullseye
• rust / rust-postgres — bullseye
• javascript-node / typescript-node / javascript-node-postgres / javascript-node-mongo — 22-bullseye, 24-bullseye
• ruby / ruby-rails-postgres — 3.3-bullseye, 3.4-bullseye
• jekyll — bullseye

Updated base image pins from base:bullseye → base:bookworm in templates that hard-code the tag in devcontainer.json / Dockerfile:

• docker-in-docker, docker-outside-of-docker, docker-outside-of-docker-compose
• kubernetes-helm, kubernetes-helm-minikube
• markdown

Added Go 1.27 image variants to go and go-postgres:

• New proposals 1.27-trixie and 1.27-bookworm
• Bumped default → 1.27-trixie

Updated default where it pointed at a removed variant:

• jekyll: bullseye → bookworm
• All other defaults (trixie / 24-trixie / 4.0-trixie) were already valid.

Patch-bumped version in each edited devcontainer-template.json:

Template	Version
debian	4.0.1
rust	5.0.1
rust-postgres	5.0.1
go	6.0.1
go-postgres	6.0.1
javascript-node	6.0.1
typescript-node	6.0.1
javascript-node-postgres	6.0.1
javascript-node-mongo	6.0.1
ruby	6.0.3
ruby-rails-postgres	6.0.3
jekyll	2.2.3
docker-in-docker	1.3.4
docker-outside-of-docker	1.3.3
docker-outside-of-docker-compose	2.3.3
kubernetes-helm	1.4.3
kubernetes-helm-minikube	2.2.4
markdown	1.1.3

Notes

• ruby-rails-postgres builds FROM mcr.microsoft.com/devcontainers/ruby, so it tracks ruby's variants and was updated in lockstep.
• Residual bullseye mentions remain only in option description hint text and the auto-generated README.md files (regenerated by the Update Documentation workflow, not hand-edited).
• Proposal ordering and unrelated options were left untouched; changes are scoped to the flagged variants.

• Fixes Sync template image variants with devcontainers/images #444

[Kaniska (v-Kaniska244)]

Copilot Go 1.27 has been newly introduced devcontainers/images and highlighted in the unused tag too, This one is is a genuine update unlike others listed in unused tags. Correct it.

[Copilot]

Copilot Go 1.27 has been newly introduced devcontainers/images and highlighted in the unused tag too, This one is is a genuine update unlike others listed in unused tags. Correct it.

Added 1.27-trixie and 1.27-bookworm to both go and go-postgres proposals (verified against src/go/manifest.json in devcontainers/images, where latest is now 1.27-trixie), updated each default to 1.27-trixie, and patch-bumped both templates to 6.0.1. See ba8b894.

[Kaniska (v-Kaniska244)]

Copilot Still error in test https://github.com/devcontainers/templates/actions/runs/34512020730/job/102988443678?pr=445, there are missing tags, check again.

[Copilot]

Copilot Still error in test https://github.com/devcontainers/templates/actions/runs/34512020730/job/102988443678?pr=445, there are missing tags, check again.

Fixed the remaining MISSING tags. The earlier commit only covered the primary templates; the same images are referenced by dependent/base-pinned templates that still produced bullseye tags:

• javascript-node:5-22/24-bullseye — removed bullseye from javascript-node-mongo and javascript-node-postgres (their Dockerfiles build FROM devcontainers/javascript-node).
• rust:2-1-bullseye — removed bullseye from rust-postgres (builds FROM devcontainers/rust).
• base:bullseye — repointed the hardcoded pins to base:bookworm in docker-in-docker, docker-outside-of-docker, docker-outside-of-docker-compose, kubernetes-helm, kubernetes-helm-minikube, and markdown (base now publishes only trixie/bookworm).

Each edited template's version was patch-bumped and Prettier applied. See dc9c8cd.