Simple Flask sample

Just wanna to create a very simple Flask application in a single python source file:

simple.py

from flask import Flask

application = Flask("simple")

@application.route("/")

def index():

return "Hello World"

To run this Flask application, run the following:

• export FLASK_APP=simple.py
• flask run

If you want to put this application in a Docker container, you need to bind to 0.0.0.0:

• flask run --host 0.0.0.0

Now, navigate "http://localhost:5000" to see the word "Hello World" displayed on the browser.