The build includes a single image with the web-stack installed and configured (PHP 7.1, Nginx, Mysql). Magento installation is based on the develop branch of the official https://github.com/magento-engcom/msi repository.
Clone the repository and run docker build . command from the repository root directory. Once the build process is finished you can create a new container from the image.
Nginx host configuration can be changed by editing hosts/msi.conf file. For changing Magento installation configuration, feel free to edit magento-install.sh file.