Docker: Up & Running Apr 2026

: When you deploy, you throw away the old environment entirely. This prevents "configuration drift" where apps accidentally rely on artifacts or manual "hotfixes" left behind by previous releases. Building for Production

The following write-up is based on the industry-standard guide by Sean Kane and Karl Matthias. Core Philosophy: Atomic Containers Docker: Up & Running

: Containers are intended to be ephemeral—nothing in the application's environment should live longer than the application itself. : When you deploy, you throw away the

: Best practices include avoiding running containers as root and using specialized tools to scan images for secrets or vulnerabilities. Advanced Orchestration & Ecosystem Core Philosophy: Atomic Containers : Containers are intended

: Learn to use multi-stage builds to create the smallest possible production-ready containers by separating build-time dependencies from the final runtime.

: For production stability, you must set memory and CPU limits to prevent a single container from exhausting host resources and crashing the system.