How does an Image differ from a container?

Image — is a template or a layered file containing all the dependencies, libraries, configurations, and the application itself necessary to run an application. It is static and does not change after creation.

Container — is a running instance of an image. A container operates as an isolated environment where the application runs and can change its state during operation.

Example:

• Image — is like a disk snapshot with the OS and programs installed.
• Container — is like a virtual machine running based on that snapshot.

In the context of Go, if you create a Docker image with your Go application, this image is an Image. When you run this image, a container is created in which your application runs.