Install flask & requests using pip:

	pip install Flask
	pip install requests

Install ngrok from - https://ngrok.com/.

Run the dev server using:

python server.py

Use ngrok to tunnel the connection.

ngrok http 5000

You shall see the url for your local server. Something like: https://6cecffb8.ngrok.io.

• Create a Facebook App.
• Add the Messenger Product.
• Enable webhooks. Use the above URL as the callback webhook URL.
• Edit server.py and update the VERIFY_TOKEN with the token you set.
• Once the callback is verified, subscribe the app to one of your pages.
• Also generate a page access token for that page.
• Edit server.py and update the ACCESS_TOKEN with the new token we got.