Docker

🔍🐳 Overview

Docker is a platform designed to simplify application development and deployment using lightweight, portable containers. Containers bundle an application with all its dependencies and environment configurations, enabling consistent behavior across different systems.

💡 Key Features

• Containerizes applications for consistent development and deployment environments
• Isolates services in lightweight containers
• Works across all major OS platforms
• Easily integrates with CI/CD pipelines
• Broad ecosystem with Docker Hub for sharing images

🚀 How I Use It

• ✅ Local development environments (e.g., for React apps, Jupyter Notebooks, python scripts, MkDocs, etc.)
• ✅ Docker Compose to manage multi-container setups (e.g., web + database services)
• ✅ Used in projects like Portfolio
• ✅ Containerized data science workflows for reproducibility

⚙️ Setup & Configuration

1. Install Docker on your OS
2. Create a Dockerfile to define your environment
3. Use docker build and docker run to build and launch containers
4. Use docker-compose.yml for multi-service orchestration

Example docker-compose.yml for local dev:

version: '3.8'
services:
  web:
    build: .
    ports:
      - "3000:3000"
    volumes:
      - .:/app
    environment:
      - NODE_ENV=development

📚 Resources

• Official Docs
• Docker Hub
• Play with Docker (browser-based Docker sandbox)
• Awesome Docker

🧠 Notes & Tips

• Use .dockerignore to avoid copying unnecessary files into images
• Prefer multi-stage builds to reduce image size
• Learn to tag and push images to Docker Hub or GitLab Container Registry
• Combine with tools like Lazydocker for a better local CLI experience