Docker & Azure Container Registry

Azure Container Registry

1. An image is a read-only template with instructions on how to create the container.
2. The container is the runnable instance of the image.
3. A container registry is a service that stores and distributes container images.
4. Docker Hub is a public container registry on the web that serves as a general catalog of images.
   1. Azure offers a similar service called Azure Container Registry, which gives customers complete control over their images, integrated authentication

What is Docker?

1. A Docker container is a standard that describes the format of containers and provides a runtime for Docker containers.
2. Docker is an open-source project that automates the deployment of containers that can run in the cloud or on-premises.
3. Docker is also a company that promotes and evolves the technology, and they work in collaboration with cloud vendors like Microsoft.
4. The result of adopting docker, or container, is that the application can be deployed or undeployed faster, start and stop faster, change to another "image" faster, process, and do many things faster.
5. Apps run the same, regardless of where they're run
   1. Any machine
   2. No compatibility issues
   3. Predictable behavior
   4. Works with any language, any OS, any technology