# install python and virtualenv 
apt install python3.6
pip3 install virtualenv

# setup python virtual environment 
virtualenv -p python3 env3
source env3/bin/activate

# install requirements 
cd backend
pip install -r requirements.txt

python server.py -c config.json -l ../examples/html_document/config.xml -i ../examples/html_document/tasks.json -o output