What is Docker and Why Developers Use It

Introduction Modern software development requires applications to run consistently across multiple environments such as local machines, testing servers, and production infrastructure. One common challenge developers face is the issue of “it works on my machine but not on yours.” Differences in operating systems, libraries, and dependencies can cause applications to behave differently across environments. Docker solves this problem by providing a containerization platform that allows developers to package applications along with all their dependencies into standardized units called containers. These containers ensure that applications run reliably regardless of where they are deployed. This article explains what Docker is, how it works, and why developers use Docker in modern software development. What is Docker Docker is an open source platform designed to build, package, and run applications inside containers. A container is a lightweight, standalone package that includes everything n