Welcome to 'Docker Decoded: Docker Programming Demystified- Step-by-Step Methods for Beginners'.Given the rapid advancements in technology, it is now imperative for developers and IT specialists to comprehend containerization, a technology that is fundamentally altering the way applications are created, distributed, and used. Docker, a platform that offers a simple way to build, pack, and run applications inside of containers, is essential to this transformation.But why all the fuss about Docker and containers?Assume that you are creating a delicate work of art. You wouldn’t want to give it away without a protective cover for fear of damage or tampering. Essentially, Docker provides your applications with a 'protective casing' that keeps them consistent across many environments-from your personal laptop to a massive cloud infrastructure.But for many, the thought of using Docker can be intimidating. Concepts like 'container,' 'image,' 'Dockerfile,' and 'Compose' may seem unfamiliar. Fear not, though! This e-book tries to demystify Docker programming for you by dissecting these ideas in an approachable, systematic way.