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Docker Best Practices: Building Production Containers

Build efficient Docker containers. Multi-stage builds, security hardening, and optimization techniques.

Rottawhite Team12 min readFebruary 22, 2025
DockerContainersDevOps

Docker Best Practices

Build efficient, secure container images.

Image Optimization

Multi-stage Builds

  • Smaller final images
  • Build dependencies separate
  • Production-only artifacts

    • Layer Caching

  • Order commands wisely
  • Minimize cache invalidation
  • Use .dockerignore

    • Security

    Base Images

  • Use official images
  • Pin versions
  • Scan for vulnerabilities

    • Runtime

  • Non-root users
  • Read-only filesystem
  • Minimal permissions

    • Best Practices

  • One process per container
  • Use health checks
  • Log to stdout/stderr
  • Handle signals properly
  • Use environment variables

    • Conclusion

    Well-built containers improve security and operational efficiency.

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