Creating a webhook in Flask
When you request a page from the node server on every request you receive in the flask app that handles CRUD changes you effectively created a web hook (one server requesting or posting another). You may want to offload this to a background thread or job system, like beanstalkd. Giving you asynchronous webhook calls. If you want the page you monitor to also update you might be interested in web sockets.
I have a chrome extension ingesting data from various web pages I visit and storing it to a database (Python/Flask)
I also have a dashboard visualizing that database (using react-create-app node/react/redux).
I want the dashboard to be automatically updated every time I add/delete/modify a record in the database. 
From what I understand that is specifically what a webhook is for. 
What I want to do is create a "listener" on the database so that every time a change is made, it will fire off a request to the node server.
A few things: 1.) How do I create "something" to listen for changes in a database? 2.) Normally my webpage initiates a web request and listens for data in the call back. How do I structure it so it just "listens" for new updates?