How to use flask to issue a static file on request WITHOUT using templates?

Question

Flask

How to give a simple static file file1.html in response to a request NOT using templates

from flask import Flask, request

app = Flask(__name__)

@app.route('/red')
def index():
    return ???file1.html???
 
if __name__ == '__main__':
    app.run(debug=True)

Answer 1

https://flask.palletsprojects.com/en/latest/api/?h...