- Update base image from node:18-slim to node:22-slim (matching
package.json engines requirement)
- Add git to apt-get install (needed by npm dependencies)
- Add webpack-ext step (builds external bundles)
- Add mkdir -p src/pack (prevents race condition)
- Add pack-prod step (builds application bundles)
- Reorder: build steps before gs-app-server install
Tested on ARM64 (Raspberry Pi 4, Docker 29.4.0) and x86_64 (Ubuntu
24.04, Docker 28.0.4). Without these changes, the container starts
but serves an incomplete app that never finishes loading.
