Great tutorial at https://www.digitalocean.com/community/tutorials/how-to-make-a-web-application-using-flask-in-python-3
Dependencies:
$ source bin/activate
(Flask-Web-App) $ pip3 install --upgrade pip
(Flask-Web-App) $ pip3 install flask
(Flask-Web-App) $ export FLASK_APP=app && export FLASK_ENV=development
(Flask-Web-App) $ python3 init_db.py
(Flask-Web-App) $ flask run --host=0.0.0.0
* Serving Flask app "app" (lazy loading)
* Environment: development
* Debug mode: on
* Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)
* Restarting with stat
* Debugger is active!
* Debugger PIN: ***
192.168.1.1 - - [13/Jan/2021 17:11:25] "GET / HTTP/1.1" 200 -
192.168.1.1 - - [13/Jan/2021 17:11:26] "GET /about HTTP/1.1" 200 -
192.168.1.1 - - [13/Jan/2021 17:11:27] "GET /create HTTP/1.1" 200 -
192.168.1.1 - - [13/Jan/2021 17:11:41] "POST /create HTTP/1.1" 302 -