Containerisation

A technology that packages an application and all its dependencies into a standardised unit called a container, ensuring it runs identically across any environment regardless of the underlying infrastructure.

Containerisation eliminates the classic "it works on my machine" problem. By packaging everything an application needs into a portable container, teams can deploy with confidence that production will behave exactly as development and testing did.

A founder's development team packages her SaaS application in Docker containers. The application runs identically on any developer's laptop, on the CI/CD testing environment, and on the production server, eliminating environment-specific bugs and cutting deployment debugging time by 80%.