Alpine + libc6-compat still lost the fight with Tailwind v4's prebuilt
oxide / lightningcss / rolldown bindings on the Portainer host. Debian
slim (glibc-native) is the known-good base for this stack. The serve
stage stays nginx:alpine, so the deployed image size is unchanged —
only the discarded build stage grew.
Also flip the home-page navbar from floating to the standard layout.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>