Docker
Packaging applications and their dependencies into portable, reproducible containers
Docker is a containerisation platform that packages an application, its runtime, libraries, and configuration into a single portable unit called a container image. Containers run consistently across development laptops, CI servers, and production environments, eliminating the class of problems caused by environment differences. Docker introduced containerisation to mainstream software development and remains the standard toolchain for building, running, and distributing container images. It sits at the centre of modern deployment workflows: images built with Docker are deployed via orchestration platforms such as Kubernetes, run in managed container services on every major cloud provider, and shipped through CI/CD pipelines across virtually every serious engineering organisation.
Official Website
Docker official site →Pricing
View pricing →Certification
Docker Certified Associate (DCA)Docker Use Cases
- Packaging an application together with all its runtime dependencies into a container image that runs identically in any environment
- Running isolated local development environments that match production configuration without installing dependencies directly on the host machine
- Building multi-container applications where services such as a database, backend API, and frontend are orchestrated and networked together
- Shipping tested container images through a CI/CD pipeline so the same verified artefact is deployed to every environment
- Providing consistent, reproducible environments for data science and machine learning workflows, ensuring experiments run the same way across teams
Docker Learning Resources
The official Docker documentation at docs.docker.com covers installation through advanced compose and swarm configurations. Play with Docker at labs.play-with-docker.com provides a free browser-based environment for practising container commands without local setup.