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