Docker

Docker is designed to make software runnable in a consistent and predictable way across different environments. Its core purpose is to eliminate the classic problem of applications behaving differently on a developer’s machine, in testing, and in production.

Docker achieves this by packaging an application together with its runtime, system libraries, and dependencies into containers. These containers run the same way regardless of the underlying operating system or infrastructure, as long as a compatible container runtime is available.

By standardizing how software is built, shipped, and executed, Docker simplifies deployment, improves reproducibility, and reduces environment-related errors. It enables faster onboarding, clearer separation between application and infrastructure concerns, and more reliable collaboration between development and operations without prescribing a specific architecture or programming language.