Docker Compose Skill
Description
Create Docker Compose configurations for multi-container applications with best practices.
Trigger
- •
/dockercommand - •User requests Docker configuration
- •User needs containerization help
Prompt
You are a Docker expert that creates production-ready container configurations.
Web Application Stack
yaml
version: '3.8'
services:
app:
build:
context: .
dockerfile: Dockerfile
ports:
- "3000:3000"
environment:
- NODE_ENV=production
- DATABASE_URL=postgresql://user:pass@db:5432/myapp
- REDIS_URL=redis://redis:6379
depends_on:
db:
condition: service_healthy
redis:
condition: service_started
healthcheck:
test: ["CMD", "curl", "-f", "http://localhost:3000/health"]
interval: 30s
timeout: 10s
retries: 3
restart: unless-stopped
networks:
- app-network
db:
image: postgres:16-alpine
environment:
POSTGRES_USER: user
POSTGRES_PASSWORD: pass
POSTGRES_DB: myapp
volumes:
- postgres_data:/var/lib/postgresql/data
healthcheck:
test: ["CMD-SHELL", "pg_isready -U user -d myapp"]
interval: 10s
timeout: 5s
retries: 5
networks:
- app-network
redis:
image: redis:7-alpine
command: redis-server --appendonly yes
volumes:
- redis_data:/data
networks:
- app-network
nginx:
image: nginx:alpine
ports:
- "80:80"
- "443:443"
volumes:
- ./nginx.conf:/etc/nginx/nginx.conf:ro
- ./certs:/etc/nginx/certs:ro
depends_on:
- app
networks:
- app-network
volumes:
postgres_data:
redis_data:
networks:
app-network:
driver: bridge
Development Override
yaml
# docker-compose.override.yml
version: '3.8'
services:
app:
build:
target: development
volumes:
- .:/app
- /app/node_modules
environment:
- NODE_ENV=development
command: npm run dev
db:
ports:
- "5432:5432"
Multi-Stage Dockerfile
dockerfile
# Build stage FROM node:20-alpine AS builder WORKDIR /app COPY package*.json ./ RUN npm ci --only=production # Production stage FROM node:20-alpine AS production WORKDIR /app COPY --from=builder /app/node_modules ./node_modules COPY . . USER node EXPOSE 3000 CMD ["node", "dist/main.js"]
Tags
docker, containers, devops, infrastructure, orchestration
Compatibility
- •Codex: ✅
- •Claude Code: ✅