Flask is a Python framework. You can find more info at the official website.
https://flask.palletsprojects.com
How to start a Flask application?
To start flask application, run
python app.py
How to run flask application on port 80
To run flask application on port 80, use command
flask run --host 0.0.0.0 --port 80
Or edit app.py, use the following code
if __name__ == '__main__':
app.run(host='0.0.0.0', port=80)
Or you can use the following environment variables
FLASK_RUN_HOST=0.0.0.0 FLASK_RUN_PORT=80
Port 80 can only be used by the root user, so you need to run the above command as root. Only do this for testing as it is insecure to run an application as the root user.
Default flask app name
When you run
flash run
It looks for app.py file. If you need to change the file name, you can use the environment variable
FLASK_APP=application.py
