http://flask.pocoo.org/docs/1.0/installation/#install-install-virtualenv
python3 -m venv venv
. venv/bin/activate
oppure
eseguire lo script: ./activate-venv.sh
pip install -r requirements.txt
http://flask.pocoo.org/docs/1.0/installation/#install-install-virtualenv
python3 -m venv venv
. venv/bin/activate
oppure
eseguire lo script: ./activate-venv.sh
pip install -r requirements.txt