Docker is an open-source platform that helps you build, package, and run applications inside containers.
A container is a lightweight, portable unit that includes everything an application needs to run: code, libraries, system tools, and settings.
Key points about Docker:
Containers are faster and lighter than traditional virtual machines (VMs).
Docker makes it easy to move applications between different environments (like from your laptop to a server) without worrying about compatibility issues.
Developers use Docker to make sure their apps work the same way everywhere — whether on a personal computer, a company server, or in the cloud.
Docker Hub is a public library of ready-to-use containers, like apps and services you can deploy instantly.
