Docker is an open platform for rapidly building, delivering, and executing a variety of applications. It allows for faster software delivery by separating applications from infrastructure. Docker techniques encourage rapid shipping, testing, and deployment of code anywhere, reducing the time between code development and production deployment. It assists both developers and system administrators by letting developers write code without having to worry about the system on which it will eventually run. It also can minimize the number of systems and provide operations workers more flexibility. The principles of Docker containers are discussed in this paper and recent research on the subject. The document also contains significant use cases, as well as the pros and challenges of using it.