After clone you need to clone totum-mit into this repo and install Composer:
git clone https://github.com/totumonline/totum-mit.git
cd totum-mit
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php composer-setup.php --quiet
rm composer-setup.php
php composer.phar install --no-dev
After that you can make build.
Totum on Docker Hub: https://hub.docker.com/r/totumonline/totum-mit