mvnw is a bash script; eclipse-temurin:21-jdk-alpine only provides ash
(busybox), causing the container to exit silently with code 0 before the
JVM starts. The Debian-based eclipse-temurin:21-jdk image includes bash.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Replace the devcontainer (sleep infinity + VS Code image) with a proper
dev setup:
- Dockerfile: eclipse-temurin:21-jdk-alpine running ./mvnw spring-boot:run
- Source mounted at /app, Maven deps cached in named volume maven_cache
- Healthcheck on /actuator/health so frontend waits until backend is ready
- frontend depends_on backend: service_healthy (was service_started)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>