A Docker container is a standard unit of software that packages up code and all its dependencies so that the application runs quickly and reliably from one computing environment to another. It is a lightweight, standalone, executable package of software that includes everything needed to run an application: code, runtime, system tools, system libraries, and settings. Containers are isolated from one another and bundle their own software, libraries, and configuration files, and they can communicate with each other through well-defined channels). Docker is a tool that automates the deployment of applications in lightweight containers so that applications can work efficiently in different environments in isolation).

Some key features of Docker containers include:

• Portability: Docker containers can run on a developers local laptop, on physical or virtual machines in a data center, on cloud providers, or in a mixture of environments.

• Isolation: Containers are isolated from one another and bundle their own software, libraries, and configuration files).

• Efficiency: Containers use fewer resources than virtual machines because they share the services of a single operating system kernel).

• Standardization: Docker created the industry standard for containers, making them portable anywhere.

Docker containers can be run on any Linux, Windows, or macOS computer, and they can be deployed in a variety of locations, such as on-premises, in public or private cloud). Docker provides tooling and a platform to manage the lifecycle of containers, from development to deployment.