Add first-party data support to Beachfront doc (#3853)
Add first-party data support to Beachfront doc (#3853)

* update beachfront doc

* update

* update

* update

Co-authored-by: John Salis <a51dda7c7ff50b61eaea0444371f4a6a9301e501@beachfront.com>
prebid/prebid.github.io,prebid/prebid.github.io,prebid/prebid.github.io