A popular platform for building, sharing, and running applications inside containers.
Docker, released in 2013, made containers practical for everyday developers. You describe an application's environment in a text file called a Dockerfile, build it into an image, and run that image as a container on any machine with a compatible container runtime.
For example, a Dockerfile might start from an official Python image, copy in the application code, install dependencies, and define the command that starts the web server. Images can be shared through registries such as Docker Hub. Docker Compose lets you define multi-container setups, like an app plus a database, in a single file. In production, containers built with Docker are frequently managed by an orchestrator such as Kubernetes.
A lightweight, portable package that bundles an application with its dependencies so it runs the same way across different environments.
DevOpsA culture and set of practices that unite software development and IT operations to deliver software faster and more reliably.
KubernetesAn open-source platform that automates deploying, scaling, and managing containerized applications across clusters of machines.
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A beginner's guide to Docker: what images and containers are, why teams use them, and a first hands-on example you can run in about 15 minutes.