Docker

Docker is a platform for building, shipping, and running applications in containers. It improves portability and scalability across development and production environments.

Main Components

• Dockerfile: File that defines a container image.
• Docker Compose: Tool to define and run multi-container applications.
• Docker Hub: Public registry for sharing Docker images.

Basic Usage

Create an Image with Dockerfile

Example Dockerfile:

FROM ubuntu:latest
RUN apt-get update && apt-get install -y nginx
CMD ["nginx", "-g", "daemon off;"]

Build and run:

docker build -t my-server .
docker run -p 80:80 my-server

Container Management

docker ps       # List running containers
docker stop ID  # Stop a container
docker rm ID    # Remove a container

Docker Compose

Example docker-compose.yml:

version: "3"
services:
  web:
    image: nginx
    ports:
      - "80:80"

Start services:

docker-compose up -d

Additional Resources

• Docker Official Documentation