Glossary term
What is Image / Registry? Meaning for developers
Container template / place where images are stored. Example: myshop/api:1.4.2 pushed to Docker Hub or ECR.
Learn it properly · System DesignLesson 55: Docker & Containers for Beginners“It works on my machine” ends here. What containers really are (and aren't), images, layers and registries, a production-grade multi-stage Dockerfile, running and composing containers locally, tags vs digests, and the security basics.