Integrate with ProxyCrawl crawler

[rochenka]

Proxycrawl a service with crawling tools has a crawler which is powerful to use to grab data from any website, it works as a pub/sub system and data is collectable via webhooks. It would be of good benefit if it can be integrated with this project in a way where asynchronous callbacks can be implemented. for reference. https://proxycrawl.com/anonymous-crawler-asynchronous-scraping