Direct answer
What is Docker?
- Short definition
-
Docker packages an app and the tools it needs into a container. The container helps the app run the same way on laptops, test servers, and live servers.
- Why it matters
- Docker reduces setup problems between team members and environments. It makes it easier to run the same app in more than one place.
How teams use Docker
Use this term when you need to describe the practical role it plays in a software project.
Common use cases
- Ensuring consistent development across team environments
- Deploying applications with all dependencies
- Running multiple isolated services on one server
- Scaling applications horizontally
Examples of Docker
These examples show the term in everyday product, platform, or operations work.
Real-world examples
- Docker container running Laravel, PHP, Nginx, and MySQL together
- Development environment matching production exactly
- Running microservices that communicate via Docker networking