Docker containerization

Skill ulpi-io/plugin-marketplace/plugins/aj-geddes/skills/docker-containerization

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.From its SKILL.md

Install

npx -y skills add ulpi-io/plugin-marketplace --skill docker-containerization

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

2 things to look at

no licenseNo license file was found in the repository. Code published without one is not open source by default, so using it at work is a question for whoever answers licensing questions where you are.
1 stars1 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

SKILL.md

2.6 KB, 565 tokens by cl100k_base, as published. Nobody here has run it

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

What ships with it: 8 files

5.4 KB alongside SKILL.md, 1 of them executable