I understand that docker stores every images with layers. If I have multiple users on one development server, and everyone is running the same Dockerfile, but storing the image as, user1_myapp. And user2 is storing it as user2_myapp. Now again, they are using the same Dockerfile.
The question is, if the image is for example 100mb, are both images taking 100mb each, or are they sharing the same image and using only 100mb instead of 200mb?