Docker Images Explained
Learn about Docker images, Docker registry, and how to create a Dockerfile.
We'll cover the following...
Docker images
A Docker image is an executable package of software similar to an application artifact that entails everything needed to run an application and is used on any environment, depending on the instructions used to build it. The Docker image includes source code and complete environment configuration.
An image is designed with a template known as Dockerfile, which defines how an image will run in a container. Containers are running instances of an image, i.e., whenever an image is created and run, a container has been provisioned.
Dockerfile
A Dockerfile is a template used to build a Docker image. It contains the base operating system on which the application will be built, source code, dependencies, and scripts to install and run the application.
Creating a Dockerfile
We’ll be explaining some of the commands or functions that make up a Dockerfile:
FROM: A Dockerfile starts off from a base image. Using this creates a layer on which the operating system of the base image would be ...