Docker Images and Dockerfile
Explore the concept of Docker images as reusable templates for containers and learn how Dockerfiles define their configuration, including base images, installation steps, and runtime settings. Understand image tagging, the role of Docker Hub, and how to create development versus production Dockerfiles to optimize your containerized applications.
We'll cover the following...
Images
A Docker image is a snapshot of a file and operating system with libraries and application executables. In essence, an image is a recipe or template for creating a container. It’s similar to how some computer languages let you define a reusable class template for instantiating objects of the same type.
Any number of containers can be started from a single image. This permits scaling on production servers, although you’re unlikely to launch multiple containers from the same image during development.
The Docker Hub provides a ...