Needed packages: (python3-flask python3-sqlalchemy) python3-mysqldb python3-flask-sqlalchemy

Start with:
FLASK_APP=seepark_web.py FLASK_DEBUG=1 SEEPARKINI=~/seewasser.ini flask run

Option:
-h 0.0.0.0
at the end to listen on all interfaces, i.e.
FLASK_APP=seepark_web.py FLASK_DEBUG=1 SEEPARKINI=~/seewasser.ini flask run -h 0.0.0.0
(or :: instead of 0.0.0.0 for ipv4+ipv6)


Go to:
http://127.0.0.1:5000/
or http://<ipaddress>:5000/
if the app is running on a different machine

---

notes on a "production" server:

needed: python3-waitress

version 1:

1) add to web/seepark_web.py:
from waitress import serve

if __name__ == "__main__":
    #app.run()
    serve(app, listen='*:5000')

2) run:
SEEPARKINI=~/seewasser.ini python3 web/seepark_web.py

version 2:

1)
touch web/__init__.py

2)
add to web/seepark_web.py:
def create_app():
    return app

3)
run (in folder web):
SEEPARKINI=~/seewasser.ini waitress-serve --port 8765 'seepark_web:app'


links:

http://flask.pocoo.org/docs/1.0/tutorial/deploy/
http://flask.pocoo.org/docs/1.0/tutorial/factory/
https://github.com/pallets/flask/blob/1.0.2/examples/tutorial/flaskr/__init__.py

https://docs.pylonsproject.org/projects/waitress/en/latest/
https://docs.pylonsproject.org/projects/waitress/en/latest/runner.html#runner

https://gr33ndata.blogspot.com/2012/01/waitress-flask.html