docker-containerization

Multi-stage Docker builds separate build dependencies from runtime environments by copying only necessary artifacts to a minimal production image. This approach creates smaller, more secure containers by discarding build tools and intermediate files not needed at runtime.

Optimize Docker layer caching by structuring your Dockerfile to copy dependency files before source code, maximizing cache utilization on subsequent builds. This ensures unchanged layers are reused rather than rebuilt, significantly reducing build times.

Docker Compose defines and manages multi-container application environments for both development and production. You can create separate Compose files or use overrides to define environment-specific services, volumes, and network configurations.

Docker security best practices include implementing non-root users, using minimal base images, enabling read-only filesystems, and performing vulnerability scanning. These measures reduce attack surface and limit potential container escape risks.

Docker containers may fail to handle shutdown signals due to improper PID 1 signal handling. When your application runs as PID 1 without an init system, it may not catch and forward termination signals, causing ungraceful shutdowns.

Yes, Docker containerization supports common patterns for dependency management and secrets. You can use multi-stage builds for dependencies and Docker Compose configurations to manage environment variables and secret injection across development and production.