[typescript]: Add support for Node26 (trixie&bookworm)

[V-Subhankar-infy]

[typescript]: Add support for Node26 (trixie&bookworm)

Summary

Introduce Node 26 for the typescript-node image; version 5.0.3 → 5.1.0. Purely additive , no variants removed, no defaults changed.

Changes

• Add 26-trixie, 26-bookworm to manifest.json (variants, architectures, variantTags) with linux/amd64 + linux/arm64; 26-trixie owns the -26 tag.
• Bump manifest version to 5.1.0 and sync the README variant table, architecture line, OS-pin list, and version examples.

Notes

• Minor bump — the addition is non-breaking and nothing was removed or retargeted.
• latest stays 24-trixie , Node 26 isn't Active LTS until Oct 2026. This matches javascript-node, which also ships Node 26 without making it latest.
• 26-bookworm intentionally has no variantTags entry, mirroring 22-bookworm/22-bullseye. It still publishes 5.1.0-26-bookworm, 5.1-26-bookworm, 5-26-bookworm from the base tags array. The short -26 alias points at trixie by design, exactly as -24 → 24-trixie; assigning it to both variants would make two variants claim one tag.
• No Dockerfile change. Since the manifest declares parent: javascript-node, prepDockerFile rewrites the ARG VARIANT/FROM block at build time from the parent's own manifest version, so the checked-in FROM ...javascript-node:4-${VARIANT} literal is not used during a release build and Node 26 resolves on its own.
• Depends on the parent image: javascript-node already publishes 5-26-trixie and 5-26-bookworm (v5.0.2).

Tests

• manifest.json validates as JSON; variants, architectures and variantTags are consistent.
• Upstream base tag validation: 8/8 variants valid, including node:26-trixie and node:26-bookworm.
• Clean local build from a pruned cache succeeded (exit 0); all 26 default smoke tests passed.
• Node 26 verified on both new variants using release-equivalent parent tags ,node v26.5.0, tsc 7.0.2 on trixie and bookworm.

Impact

• New: :26, :26-trixie, :26-bookworm tags available.
• No breaking changes , latest and all existing Node 22/24 tags are unaffected.

[Copilot]

Pull request overview

Adds Node 26 Debian variants to the typescript-node dev container image by extending the image manifest and updating the README so consumers can reference the new tags. This fits into the existing image/variant publishing model where typescript-node follows the javascript-node parent’s variant set.

Changes:

• Bump typescript-node manifest version from 5.0.3 to 5.1.0 (minor release for an additive change).
• Add 26-trixie and 26-bookworm variants with linux/amd64 + linux/arm64 architectures; assign the short -26 alias to 26-trixie.
• Update README variant list/architecture statement and add :26 usage examples.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/typescript-node/manifest.json	Adds Node 26 variants, architectures, and version bump to publish new tags while keeping latest unchanged.
src/typescript-node/README.md	Updates documented variants/architectures and adds Node 26 tag examples.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.