Docker

Introduction

Docker is a platform for developing, shipping, and running applications in containers.

Key Concepts

Containers

Containers are lightweight, standalone packages that include everything needed to run an application.

Images

Docker images are read-only templates used to create containers.

Dockerfile

A text file containing instructions to build a Docker image.

Basic Commands

# Pull an image
docker pull nginx

# Run a container
docker run -d -p 80:80 nginx

# List running containers
docker ps

# Stop a container
docker stop <container_id>

Best Practices

• Use official base images
• Minimize layers in Dockerfile
• Use .dockerignore file
• Don't run as root