Flatten or squashing or stripped docker image

flatten-squash-docker-image.md

OPTION-1

docker image build --squash -t image-name:tag .

OPTION-2

Run the image then export the running image and save to the image repository using import

docker run ... image-name:tag
docker ps 
docker export <CONTAINER_ID> | docker import - new-image-name:new-tag

docker export `docker ps -q -n=1` | docker import - new-image-name:new-tag

Create new file Dockerfile.flatten

FROM new-image-name:new-tag

EXPOSE <PORT>

CMD ["command_here"]

Build the new container image

docker build -f Dockerfile.flatten -t image-name:flatten-tag .

Test the new container image (make sure the service is running as expected)

docker run ... image-name:flatten-tag