stable-5870

release

* d9b84cf jibri: set base URL for joining meetings
* a77a43e jibri: update default Chrome version to 90
* a90e4ce doc: drop confusing port number from PUBLIC_URL
* 8620caa doc: clarify env variable
* 6f52f71 web: add FLoC environment variable
* 014aa59 web: add default language variable
* ce25bf6 doc: update CHANGELOG
* 6bf1336 misc: working on latest