import os

from signal import signal, SIGINT

from flask import Flask, render_template

def handler(signal_received, frame):

# SIGINT or ctrl-C detected, exit without error

exit(0)

# pylint: disable=C0103

app = Flask(__name__)

@app.route('/')

def hello():

"""Return a simple HTML page with a friendly message."""

message = "It's running!"

return render_template('index.html', message=message)

if __name__ == '__main__':

signal(SIGINT, handler)

server_port = os.environ.get('PORT', '8080')

app.run(debug=False, port=server_port, host='0.0.0.0')