act runner cannot find node in PATH during post-step cleanup. Running
all steps inside a node:22-alpine container ensures node is always
available. Removes actions/setup-node as it's no longer needed.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
v4 actions require Node 20 in PATH during post-step cleanup, which act
does not provide. v3 uses Node 16 that act bundles by default.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Define Slidev skill requirement, project structure, git commit
convention, CI/CD pipeline architecture (DooD with nginx on 8080),
and key commands.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>