Docker Basics

Summary

A containerization platform that packages an app with all its dependencies into a portable, consistent unit that runs identically on any machine — solving the classic 'works on my machine' problem.

• 1Install Docker and run a public image, e.g. `docker run hello-world`.
• 2Learn the core vocabulary: image, container, Dockerfile, registry.
• 3Containerize a simple Node.js app you've already built.