Update docs/configuring-playbook-jitsi.md: add a note about the example configuration and the instruction to set up additional JVBs

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

docs/configuring-playbook-jitsi.md

@@ -58,6 +58,8 @@ jitsi_enabled: true
 
 As the most of the necessary settings for the role have been taken care of by the playbook, you can enable Jitsi on your Matrix server with this minimum configuration.
 
+However, **since Jitsi's performance heavily depends on server resource (bandwidth, RAM, and CPU), it is recommended to review settings and optimize them as necessary before deployment.** You can check [here](https://github.com/mother-of-all-self-hosting/ansible-role-jitsi/blob/main/docs/configuring-jitsi.md#example-configurations) for an example set of configurations to set up a Jitsi instance, focusing on performance. If you will host a large conference, you probably might also want to consider to provision additional JVBs ([Jitsi VideoBridge](https://github.com/jitsi/jitsi-videobridge)). See [here](https://github.com/mother-of-all-self-hosting/ansible-role-jitsi/blob/main/docs/configuring-jitsi.md#set-up-additional-jvbs-for-more-video-conferences-optional) for details about setting them up with the playbook.
+
 See the role's document for details about configuring Jitsi per your preference (such as [authentication and guests mode](https://github.com/mother-of-all-self-hosting/ansible-role-jitsi/blob/main/docs/configuring-jitsi.md#configure-jitsi-authentication-and-guests-mode-optional) and [the environment variable for running Jitsi in a LAN](https://github.com/mother-of-all-self-hosting/ansible-role-jitsi/blob/main/docs/configuring-jitsi.md#configure-jvb_advertise_ips-for-running-behind-nat-or-on-a-lan-environment-optional)).
 
 ### Adjusting the Jitsi URL (optional)