The docker image is based on the one provide by grin-miner
docker image to mine at grinmint.com
The install script is separately available through gist https://gist.githubusercontent.com/Clearwood/60294c02702b6995e719ce8a1d4df218
The docker image has been published to docker hub here: https://cloud.docker.com/u/k3no/repository/docker/k3no/grin-mining