Replace server.servlet.context-path=/api with addPathPrefix so API
endpoints stay under /api while static resources and SPA routes are
served at /. Spring Boot falls back to index.html for unknown paths
(SPA forwarding). Multi-stage Dockerfile builds frontend (Node 24)
and backend (Temurin 25) into a single 250MB JRE-alpine image with
Docker-native HEALTHCHECK.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
