Docker expert

Skill AtulPurohit/Antigravity-Awesome-Skills/plugins/devops-cloud-infra/skills/docker-expert

Build optimized, secure Docker images with multi-stage builds. Configure Docker Compose for full development and production stacks.From its SKILL.md

Install

npx -y skills add AtulPurohit/Antigravity-Awesome-Skills --skill docker-expert

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SKILL.md

2.5 KB, 583 tokens by cl100k_base, as published. Nobody here has run it

Docker Expert

Purpose

Create production-ready Docker images and container orchestration setups that are secure, minimal, and efficient.

Optimized Multi-Stage Dockerfile

# Node.js production example
FROM node:20-alpine AS base
WORKDIR /app
COPY package*.json ./

FROM base AS deps
RUN npm ci --only=production && npm cache clean --force

FROM base AS builder
RUN npm ci
COPY . .
RUN npm run build

FROM node:20-alpine AS production
WORKDIR /app

# Security: non-root user
RUN addgroup -S app && adduser -S appuser -G app
USER appuser

COPY --from=deps --chown=appuser:app /app/node_modules ./node_modules
COPY --from=builder --chown=appuser:app /app/dist ./dist
COPY --chown=appuser:app package.json .

EXPOSE 3000
HEALTHCHECK --interval=30s --timeout=10s   CMD wget -qO- http://localhost:3000/health || exit 1

CMD ["node", "dist/server.js"]

Docker Compose (Production)

services:
  app:
    build: { context: ., target: production }
    environment:
      DATABASE_URL: postgresql://app:${DB_PASSWORD}@db:5432/myapp
    depends_on:
      db: { condition: service_healthy }
    restart: unless-stopped

  db:
    image: postgres:16-alpine
    environment:
      POSTGRES_USER: app
      POSTGRES_PASSWORD: ${DB_PASSWORD}
      POSTGRES_DB: myapp
    volumes:
      - postgres_data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U app"]
      interval: 10s

  nginx:
    image: nginx:alpine
    ports: ["80:80", "443:443"]
    volumes:
      - ./nginx.conf:/etc/nginx/conf.d/default.conf:ro
    depends_on: [app]

volumes:
  postgres_data:

.dockerignore

node_modules
.git
.env*
*.md
coverage
.nyc_output
dist

Security Best Practices

Pin image versions: node:20.11.0-alpine not node:alpine
Scan: docker scout cves my-image
Run as non-root
Use secrets mount for sensitive build args
Minimize layers in production image

Outputs

Optimized Dockerfile for your stack
Docker Compose configuration
.dockerignore template
Security scanning setup
Production health check configuration

What ships with it

Read from the repository

Just SKILL.md. No reference files, no scripts.