Claude Code Plugins

Community-maintained marketplace

Feedback

docker-containerization

@aj-geddes/useful-ai-prompts
36
19

Create optimized Docker containers with multi-stage builds, security best practices, and minimal image sizes. Use when containerizing applications, creating Dockerfiles, optimizing container images, or setting up Docker Compose services.

Install Skill

Shared

Installs to .agents/skills, used by Codex, Amp, Warp, Cursor, OpenCode, and more.

CodexAmp
WarpCursorOpenCode
ClineGemini CLI
GitHub Copilot
Personal

Available across projects.

$npx skills-installer add @aj-geddes/useful-ai-prompts/docker-containerization --client shared
Project

Writes to .agents/skills.

$npx skills-installer add @aj-geddes/useful-ai-prompts/docker-containerization -p --client shared
Note: Review the skill instructions before using it.

SKILL.md

name docker-containerization
description Create optimized Docker containers with multi-stage builds, security best practices, and minimal image sizes. Use when containerizing applications, creating Dockerfiles, optimizing container images, or setting up Docker Compose services.

Docker Containerization

Table of Contents

Overview

Build production-ready Docker containers following best practices for security, performance, and maintainability.

When to Use

  • Containerizing applications for deployment
  • Creating Dockerfiles for new services
  • Optimizing existing container images
  • Setting up development environments
  • Building CI/CD container pipelines
  • Implementing microservices

Quick Start

Minimal working example:

# Multi-stage build for Node.js application
# Stage 1: Build
FROM node:18-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production
COPY . .
RUN npm run build

# Stage 2: Production
FROM node:18-alpine
WORKDIR /app
# Copy only production dependencies and built files
COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app/dist ./dist
COPY package*.json ./

# Security: Run as non-root user
RUN addgroup -g 1001 -S nodejs && adduser -S nodejs -u 1001
USER nodejs

EXPOSE 3000
CMD ["node", "dist/index.js"]

Reference Guides

Detailed implementations in the references/ directory:

Guide Contents
Multi-Stage Builds Multi-Stage Builds
Optimization Techniques Optimization Techniques
Security Best Practices Security Best Practices, Environment Configuration
Docker Compose for Multi-Container Docker Compose for Multi-Container
.dockerignore File .dockerignore File
Python Python (Django/Flask), Java (Spring Boot), Go

Best Practices

✅ DO

  • Use official base images
  • Implement multi-stage builds
  • Run as non-root user
  • Use .dockerignore
  • Pin specific versions
  • Include health checks
  • Scan for vulnerabilities
  • Minimize layers
  • Use build caching effectively

❌ DON'T

  • Use 'latest' tag in production
  • Run as root user
  • Include secrets in images
  • Create unnecessary layers
  • Install unnecessary packages
  • Ignore security updates
  • Store data in containers