One of the thorniest problems in software development is dealing with the different environments across different machines and platforms. USING Docker, you can isolate your applications from your infrastructure, which is crucial to delivering software quickly. DEVELOPERS can package and run their applications into containers, executable components that have all the OS (Operating SYSTEM) libraries and dependencies needed to run the application in any environment. It does not matter what is installed on the host—containers are lightweight and include everything needed to run applications.

• The code has to pass through many different environments as it travels from the developer's machine to production. Consequently, each of these environments may be slightly different. Using Docker streamlines code development and deployment, as it provides a consistent environment from development to production.
• Docker's PRIMARY purpose is to simplify configuration. With VM (Virtual Machine), you can run any PLATFORM with its configuration on top of your infrastructure. Docker offers the same functionality without the overhead of virtual machines.