Edit opensource project based on puppeteer (headless chrome)

This project will be used for my clients that need to save their social media activity every month, every quarter, or at least the last 3 years worth of social media [login to view URL] thing should be saved as a pdf. I have found this github project that can be used as the foundation for my project: [login to view URL] I need it to have the ability to insert java script before the pdf is created, insert cookies to websites that need to be logged into, ability to take pdf screenshot of social media sites, for example be able to create a pdf of a whole facebook page from the most recent post to the oldest post available and also ability to create a pdf including most recent post to a chosen date when post was taken. If it could be all contained in a docker image that would be great, however if its feasible any other way that is OK too.