Why Developers Should Use Docker

🐳 What is Docker?

• Docker is a platform that uses containerization to bundle code, runtime, system tools, and libraries into a single package — a container.

🔁 Why Use It?

• Consistency Across Environments: Code runs the same in dev, staging, and production.
• Isolation: Avoid conflicts between dependencies of different projects.
• Portability: Run your app anywhere Docker is supported.
• Simplified Setup: Onboard new devs faster — no “works on my machine” issues.

🧰 Example Use Case

A typical web app setup:

version: "3.8"
services:
  web:
    build: .
    ports:
      - "3000:3000"
    volumes:
      - .:/app
    command: npm run dev

📄 Example Dockerfile

# Use official Node.js image
FROM node:20

# Set working directory
WORKDIR /app

# Copy package files and install dependencies
COPY package*.json ./
RUN npm install

# Copy source code
COPY . .

# Start development server
CMD ["npm", "run", "dev"]

🚀 Get Started

1. Install Docker
2. Create a Dockerfile
3. Add a docker-compose.yml
4. Run docker-compose up

Using Docker in your portfolio projects shows you value clean, professional workflows. Give it a try!