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Docker Build Optimization

INFRASTRUCTURE •

Initial Problems

  • Image size: 526MB
  • Poor layer caching
  • Yarn Berry PnP compatibility issues
  • Long build times

Optimization Strategy

  1. Multi-stage build (base → deps → builder → runner)
  2. Cache mount for dependencies
  3. Proper .dockerignore configuration
  4. Fresh base strategy vs copying node_modules

Results

  • Final image: 346MB (34% reduction)
  • Layer efficiency: 99%
  • Improved build cache hit rate

Key Decisions

  • Used Alpine Linux base
  • Separated dependency installation from build
  • Production-only dependencies in final image
  • Leveraged BuildKit features