The forge's forgejo-runner (v6.3.1) only supports node runtimes up to node20,
but resolves bare `uses:` from code.forgejo.org where checkout@v6 (and the
other @v5/v6/v7 actions) declare `runs.using: node24` -> "must be one of
[... node20 ...], got node24" -> job failed before any step ran.
- checkout@v6->v4, cache@v5->v4, docker/{setup-buildx@v4->v3, login@v4->v3,
build-push@v7->v6}: all node20.
- jdx/mise-action isn't mirrored on code.forgejo.org; reference it by full
github URL, pinned to @v2 (node20).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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