start documenting jitsi instances

howto/conference.md

@@ -672,6 +672,11 @@ prometheus exporter: https://github.com/systemli/prometheus-jitsi-meet-exporter
 
 Mayfirst is testing a [patch for simultaneous interpretation](https://current.workingdirectory.net/posts/2021/jitsi-and-language-justice/).
 
+#### Other Jitsi instances
+
+ * <https://meet.keanu.im/> - guardian project, geo-distributed, SFU
+ * <https://meet.jit.si/> - official instance, geo-distributed, SFU
+
 ### Nextcloud Talk
 
 systemli is using this ansible role to install coturn: https://github.com/systemli/ansible-role-coturn