Docker Compose health check — Snippets

Add this healthcheck to a service in your Compose file. Replace the port and endpoint with the ones used by your application. The example uses Node.js 18 or newer for the built-in fetch API.

services:
  app:
    build: .
    ports:
      - '3000:3000'
    healthcheck:
      test:
        - CMD
        - node
        - -e
        - "fetch('http://127.0.0.1:3000/health').then(r => process.exit(r.ok ? 0 : 1)).catch(() => process.exit(1))"
      interval: 30s
      timeout: 5s
      retries: 3
      start_period: 10s