Docker Images
Docker images are read-only templates used to create Docker containers, containing application code, libraries, dependencies, and configuration files. They are built from a Dockerfile and stored in registries like Docker Hub, enabling consistent and portable deployment across different environments. Images use a layered filesystem for efficient storage and sharing of common components.
Developers should learn Docker images to package applications with all dependencies, ensuring they run identically on any system with Docker installed, which is crucial for microservices, CI/CD pipelines, and cloud deployments. They are essential for creating reproducible builds, simplifying deployment, and managing application versions in containerized environments.