Python 3.6+
python3 -m venv ./venv
source ./venv/bin/activate
pip install -r requirements.txt
export FLASK_APP=app.py
export FLASK_DEBUG=1
flask initdb
You may reset your database by deleting the /cafebabel.db file and re-initializing the database.
flask run
sudo python -m smtpd -n -c DebuggingServer localhost:25