Install and configure uwsgi
apt-get install uwsgi apt-get install uwsgi-plugin-python3 ln -s /home/dev/python-flask-demo/config/demo-uwsgi.ini /etc/uwsgi/apps-enabled/demo-uwsgi.ini service uwsgi restart
If there is a problem you might find help by looking at the log file:
/var/log/uwsgi/app/demo-uwsgi.log