from flask import Flask, render_template, session, request
from flask_socketio import SocketIO

app = Flask(__name__)
app.config['SECRET_KEY'] = 'APP-SECRET-KEY'
socketio = SocketIO(app, async_mode="gevent")


if __name__ == '__main__':

def do_shutdown(signum, frame):
    print("*********** STOPPING ***********")

     # Run clean up code here.....

    gevent.kill()
    exit(0)

    try:

      signal.signal(signal.SIGTERM, do_shutdown)
      signal.signal(signal.SIGINT, do_shutdown)
      signal.signal(signal.SIGALRM, do_shutdown)
      signal.signal(signal.SIGQUIT, do_shutdown)

      socketio.run(app, host="0.0.0.0", port=5000, debug=True, use_reloader=False)

    finally:
       print("Exiting")