The production stage runs npm ci --omit=dev to install runtime deps for
the pre-built SvelteKit app. The postinstall script calls patch-package,
which is a devDependency, so it is absent and causes exit code 127.
--ignore-scripts is the correct npm-native fix: no lifecycle scripts are
needed when installing into a pre-built image.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>