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Docker Compose Files and YAML Patterns/Healthcheck on a service

Defines a readiness-style health check for the service.

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Section: Dependencies and Healthchecks

Healthcheck on a service

yaml
yaml
services:
  db:
    image: postgres:16
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"]
      interval: 10s
      timeout: 5s
      retries: 5
Explanation

Useful for observability and dependency-aware startup.

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