Container Revolution
Docker packages applications and dependencies into lightweight, portable containers that run consistently across any environment.
Core Concepts
- Images: Read-only templates with application code and dependencies
- Containers: Running instances of images — isolated and lightweight
- Dockerfile: Instructions to build custom images
- Docker Compose: Define multi-container applications
- Registry: Docker Hub, ACR for storing and sharing images
Benefits
Consistent environments (dev = prod), fast startup, resource efficiency, microservices architecture support, and simplified CI/CD pipelines.
