Introduction Docker has transformed software deployment by allowing developers to package applications and their dependencies into lightweight containers. While beginners learn how to containerize a simple app, intermediate developers must understand how to optimize Dockerfiles, manage multi-container applications, and deploy effectively. This guide will expand on the basics, providing insights into best practices and real-world deployment strategies.

Introduction
Docker has transformed software deployment by allowing developers to package applications and their dependencies into lightweight containers. While beginners learn how to containerize a simple app, intermediate developers must understand how to optimize Dockerfiles, manage multi-container applications, and deploy effectively. This guide will expand on the basics, providing insights into best practices and real-world deployment strategies.