Add Dockerfile HEALTHCHECK instruction

[aleibovici]

Description

The Dockerfile currently does not include a HEALTHCHECK instruction. Docker and orchestrators (Docker Compose, Kubernetes) use this to determine if the container is healthy.

Suggested approach

• Add a HEALTHCHECK instruction to the Dockerfile
• Use the existing /api/health endpoint
• Example: HEALTHCHECK --interval=30s --timeout=5s --retries=3 CMD curl -f http://localhost:3000/api/health || exit 1

Files to look at

• Dockerfile
• src/app/api/health/ — existing health check endpoint

Quick and straightforward change — great for getting familiar with the Docker setup.