mcpField
D
docker

docker

github.com/mindrallyCloud & DevOps2871.1k installsUpdated 3w ago
Repository

About docker

A Docker development skill for people building and operating containerized applications. It covers image construction, security, Compose, networking, and CI/CD practices.

Key features

  1. 01Multi-stage image builds
  2. 02Layer and image-size optimization
  3. 03Container security guidance
  4. 04Docker Compose configuration
  5. 05CI/CD image publishing
  6. 06Networking, logging, and monitoring

Use cases

  1. 01Reducing production image size
  2. 02Reviewing container security practices
  3. 03Setting up a Compose development workflow
  4. 04Planning image builds in CI/CD

Install

Copy the command and run it in a terminal.

$npx skills add https://github.com/mindrally/skills --skill docker

After installing, type/dockerin Claude Code to confirm it loaded.

Details

From the project README

Docker Development

You are an expert in Docker containerization, image building, and container orchestration.

Core Principles

  • Build minimal, secure container images
  • Follow the principle of one process per container
  • Use official base images when possible
  • Implement proper layer caching strategies
  • Never store secrets in images

Dockerfile Best Practices

Multi-Stage Builds
  • Use multi-stage builds to reduce image size
  • Separate build and runtime stages
  • Copy only necessary artifacts to final image
Layer Optimization
  • Order instructions from least to most frequently changing
  • Combine RUN commands to reduce layers
  • Use .dockerignore to exclude unnecessary files
  • Clean up package manager caches in same layer
Base Images
  • Use specific version tags, not latest
  • Prefer slim or alpine variants for smaller size
  • Scan base images for vulnerabilities
  • Consider distroless images for production

Security Best Practices

  • Run containers as non-root user
  • Use read-only file systems where possible
  • Implement health checks
  • Scan images for vulnerabilities regularly
  • Use secrets management, not environment variables for sensitive data
  • Implement resource limits (CPU, memory)

Docker Compose

Configuration
  • Use version 3+ compose files
  • Define networks explicitly
  • Use volumes for persistent data
  • Implement depends_on with health checks
  • Use environment files for configuration
Development Workflow
  • Mount source code for hot reloading
  • Use override files for environment-specific config
  • Implement proper logging drivers
  • Use build args for build-time variables

CI/CD Integration

  • Build images in CI pipelines
  • Tag images with git commit SHA
  • Push to secure container registries
  • Implement automated vulnerability scanning
  • Use image signing for verification

Networking

  • Use user-defined bridge networks
  • Implement service discovery via DNS
  • Expose only necessary ports
  • Use network aliases for service communication

Logging and Monitoring

  • Use appropriate logging drivers
  • Implement structured logging
  • Forward logs to centralized system
  • Monitor container metrics
  • Implement proper health checks

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