Although this guide was initially created for Ubuntu 16.04, it is reported to also work on newer Ubuntu versions and Debian.
curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -
sudo apt-get update
sudo apt-get upgrade -y
sudo apt-get install -y git build-essential mongodb nodejs
git clone https://github.com/deviavir/zenbot.git
cd zenbot
npm install
./zenbot.sh --help