docker-k8slisted

# Containerization & Kubernetes with Security Hardening This skill provides comprehensive patterns for containerizing applications and deploying to Kubernetes in 2025, focusing on zero-trust security, multi-stage optimization, production hardening, and cloud-native best practices that work across different cloud providers. ## When to Use This Skill Use this skill when you need to: - Create secure multi-stage Docker builds - Deploy applications to Kubernetes with security hardening - Implement zero-trust security patterns - Set up GitOps workflows with ArgoCD/Flux - Optimize container images for production - Configure cluster security with Pod Security Standards - Implement secure networking with service meshes - Set up monitoring and observability - Deploy to multiple cloud providers (AWS, GCP, Azure, DO) ## Secure Multi-Stage Docker Builds ### 1. Security-First Multi-Stage Builds ```dockerfile # Dockerfile with security hardening # Build stage FROM python:3.11-slim AS builder # Set build-time security arguments ARG DEBIAN_FRONTEND=noninteractive ARG DEBCONF_NONINTERACTIVE_SEEN=true ARG BUILDPLATFORM ARG TARGETPLATFORM # Install build dependencies with security updates RUN apt-get update && \ apt-get upgrade -y && \ apt-get install -y --no-install-recommends \ build-essential \ libpq-dev \ ca-certificates \ curl \ && \ apt-get clean && \ rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* && \ truncate -s 0 /var/lo