Run all the shell commands inside the Raspberry Pi.
tl;dr: Installing Node.js via package manager
curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash -
sudo apt-get install -y nodejs
git clone https://github.com/OpenAgInitiative/openag_ui
cd openag_ui
npm install
./node_modules/grunt-cli/bin/grunt couchapp_deploy --app_db_url="http://localhost:5984/app"
Open your browser to http://${IP_OF_FOOD_COMPUTER}:5984/app/_design/app/_rewrite.