Hands-On RESTful Web Services with ASP.NET Core 3

Docker terminology

Before setting up our service to use Docker, let's take a quick look at the terminology behind this technology.

Let's begin by defining a container image, which is the list of all dependencies and artifacts needed to create a container instance. The term container image should not be confused with the term container instance, which refers to a single instance of a container image.

A core part of a container image is the Dockerfile. The Dockerfile provides the instructions to build a container. For example, in the case of a container that runs a .NET Core solution, it gives the commands to restore the packages and build the solution. Docker also provides a way to tag the container images and group them all in collections ...