Modern software systems are expected to run consistently across multiple environments such as development laptops, testing servers, cloud platforms and production infrastructure. One of the major challenges developers and data engineers face is ensuring that applications behave the same way regardless of where they are deployed. This challenge led to the rise of containerization , a technology that packages applications together with their dependencies into isolated, portable environments called containers . Among the most widely used containerization tools today are Docker and Docker Compose . These tools simplify application deployment, improve scalability and reduce environment-related issues. What is Containerization Containerization is the process of packaging an application together with everything it needs to run. This includes the applications source code, runtime environment, libraries, dependencies and configuration files. The application is packaged into a lightweight unit called a container .…