Docker Security Hardening: Locking Down Container Environments

**Executive Summary:** This document is a practical Docker container security hardening guide that details prioritized controls—such as running containers as non-root, dropping capabilities, enabling read-only root filesystems, enforcing no-new-privileges, resource limits, network isolation, image scanning and pinning, proper secrets management, seccomp/AppArmor profiles, and auditing with Docker Bench Security—along with examples, verification commands, and troubleshooting advice to reduce attack surface and improve host/container security.