Docker

Container platform for developing, shipping, and running applications in isolated environments. Enables consistent execution from local development to production by packaging an app with its dependencies into portable units that run the same way on any host.

Docker is widely adopted across enterprises and relied on by companies such as Adobe and Cloudflare. It established the container format and ecosystem that became the industry standard. Docker Hub hosts millions of images with billions of monthly pulls, and the open-source engine is maintained as the Moby project.

Key capabilities:

• Container runtime and CLI for building, running, and managing containers
• Dockerfile for reproducible, layered image builds
• Docker Compose for defining and orchestrating multi-container applications
• Docker Hub as a public registry for images and collaboration
• Portable workloads across local machines, data centers, and cloud providers

Teams use Docker to standardize CI/CD pipelines, run microservices with isolation, and keep local development environments aligned with production. It integrates with orchestration systems and cloud deployment targets for scaling and distribution.