How do you find out about the reduction in Docker image size?

To learn about reducing the size of a Docker image, you can use several approaches:

• Comparing image sizes: after optimization, create a new image and compare its size with the previous one using the docker images command.

• Using analysis tools: for example, dive allows you to examine the image layers in detail and see which files occupy the most space.

• Optimizing the Dockerfile: reducing the number of layers, using lighter base images (e.g., alpine), and cleaning temporary files in a single layer.

Example command to view the image size:

docker images your-image-name

If the size has decreased, the optimization was successful.