D2H2 is a Flask application. Please first ensure you have Python 3.9 installed and if not please download through homebrew or the offical Python site.
Create a Python 3.9 enviroment and install the dependencies outlined in requirements.txt.
python3.9 -m venv env
source env/bin/activate
pip3 install -r requirements.txt
Then to run the application, navigate to the the app directory and run the file app.py.
cd app
python3 app.py