What is Docker?

Quick Answer: Docker packages your app and all its dependencies into a container that runs the same everywhere.

Key Concepts

• Container - A lightweight, isolated environment for running apps
• Image - A blueprint/template for creating containers
• Dockerfile - Instructions for building an image
• Docker Hub - Repository for sharing images

Why Use Docker?

• Consistent environments (dev, staging, production)
• Easy deployment and scaling
• Isolation between applications
• Faster setup for new developers