Install python modules via
VENV
$ virtualenv env
$ source env/bin/activate
$ pip3 install -r requirements.txt
Set Up Flask Environment
$ export FLASK_APP=run.py
Start the app
$ flask run
// OR
$ flask run --cert=adhoc # For HTTPS server
At this point, the app runs at http://127.0.0.1:5000/database.html.