Note: this is a simple fork from Docker Official Image with the Ubuntu 18.04 image for testing purposes and was tested only on x86_64.
cd 19.03 && docker build --tag docker:19.03.8-ubuntu-18.04 .
cd dind && docker build --tag docker:dind-19.03.8-ubuntu-18.04 .
docker run --privileged --name dind --rm -d docker:dind-19.03.8-ubuntu-18.04
docker exec -it dind bash
# inside the DinD container:
docker run --rm -it ubuntu:18.04
# inside the container inside DinD (Inception...):
apt update
apt install -y git apt-utils python3-pip python3.8-venv
python3.8 -m venv test
source test/bin/activate
pip install git+https://github.com/will8211/unimatrix.git
unimatrix -c blue -s 97