Why the “none” image appears in Docker and how can we avoid it

Question

When I run the docker-compose build command to rebuild an image in Docker because I had changed something in Dockerfile, sometimes I get \"none\" image tags. Ho

Answer 1

There is little to add based on what @tgogos said except that it needs more upvoting.

You can check image sizes of dangling and non-dangling images here:

docker system df -v

Don't be bugged by intermediate images. This way you oversee that the build process has been made more efficient by keeping intermediate images for each line of a Dockerfile, i.e. such a line can be skipped during the build process if no change occurred.