creating a docker image with the same name -

I'm using Dockerfiles to try to automatically build my build I understand the concept of the layer I am trying to add a version of Mono already in my Dockerfile and I am writing C # application which mono call as I am developing the app, I just need the files that I need for the Docker Image I'm adding, then run the container. So every time I create a new one for my C # application, I basically just copy the new C # files. If in my dockerfile, something simple happens:

  FROM Centos // Install Mono ADD.  

When I run that build I

  Docker Build -T = "Crystal / Test"  

< P> When I update the source files of my host machine, and then I run the Docker Build command again. Is it adding another layer to my final crystal / test image, or is it starting at the Santos base and just creating a new image that transforms my old crystal / test image? Looking at the size of my image, it seems that it is not changing the old, but I am doing something else which I am not sure about. The size is only relatively consistent if I have a dock by rmi hash before it is produced, it seems a bit tedious.

If the material changes, the dockers will start from the Santos base. There is a new layer, but it is a child of Santa instead of your previous layer.