The sveltekit-base build (and the mana-web / manavoxel-web app builds on
top of it) run `pnpm install` with no .npmrc in the build context, so
private @mana/* packages resolved against registry.npmjs.org and 404'd
(e.g. @mana/shared-icons@1.0.0, which only lives on npm.mana.how). It had
been coasting on a warm pnpm cache; once sveltekit-base:local was gone the
rebuild hard-failed.
Mount the host ~/.npmrc (registry map + resolved _authToken) as a BuildKit
secret at /root/.npmrc in all three pnpm-install steps. Token never lands
in an image layer. build-app.sh passes it via --secret for the base build;
docker compose build reads it from the top-level secrets: entry.
Unblocks every managarten web rebuild (incl. the pending umami-removal).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>