Displaying charts/graphs on a website

How can I include charts/graphs on my website using JS based on the data collected by Bolt?

You can use the Bolt APIs to pull the data and store it on your server which is hosting your website. The next step would be for you to use a charts/graphs library on your website. There are many such libraries, this link lists some of the most popular ones https://blog.udacity.com/2016/03/12-best-charting-libraries-for-web-developers.html.

Once your graph code is ready, you can add a URL to your website to retrieve the stored data and display it on the graph.

This is a very general overview of the steps that you will need to do display the data on your site. Let me know if this answers your query.