The Docker documentation states that a
ENTRYPOINT is required in order to successfully build an image, yet it is possible to build an image without either of these. The following example explains how to do this, using the Alpine tar as its base image:
FROM scratch ADD alpine-minirootfs-3.11.2-x86_64.tar.gz / COPY . /
To build the image, run:
docker build -t test:1 .
The image can then be run with no
docker run -ti test:1 /bin/sh
This demonstrates that it is possible to build a Docker image without either