Workplace external sources (web sites)

Workplace has many organisation content sources (jira, confluence, sharepoint,...)

I would like to index sources like drupal or bespoke web site.
Is there a web crawling mechanism ?

How can I achieve that ?

We're hoping to introduce a crawler to Workplace Search in the future. For now, you can implement this as a Custom Source using an external crawler (or pulling the content from a database, etc).