What is Docker?

Docker is an open-source, lightweight containerization technology platform that allows developers to package their applications and dependencies into portable containers. These containers are separated from the underlying infrastructure and other containers, making them simple to move and deploy across development, testing, and production.

Docker offers a client-server architecture in which the Docker client interacts with the Docker daemon, which controls the creation, deployment, and execution of containers. Developers may use Docker to locally create and test their apps before deploying them to a production environment with confidence that they will function as intended.