from flask import Flask app = Flask(__name__) @app.route('/') def func_1(): return 'Hello world' @app.route('/test') def func_2(): return 'Test' if __name__ == '__main__': app.run(host='0.0.0.0', port=80, debug=True) $ python3 server.py * Serving Flask app "server" (lazy loading) * Environment: production WARNING: This is a development server. Do not use it in a production deployment. Use a produc