version: '3.8'
services:
  my-service:
    image: alpine
    command: tail -f /dev/null
    depends_on:
      nginx: { condition: service_healthy }

  nginx:
    image: nginx:alpine
    healthcheck:
      test: 'echo | nc -w 5 localhost:80'
      interval: 2s
      timeout: 1s
      retries: 10