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pip3 install -r requirements.txt
sudo PASSWORD=thepassword python3 app.py
A password is required to access the home page (to edit routes). Specify the password through the above command.
To change a route, just submit the form again and it will overwrite the old one.
If you see invalid command bdist_wheel when installing, try pip3 install wheel. If it still gives you issues, just get rid of Flask-BasicAuth from the requirements and write some other janky auth method.