Add documentation

docs/maintenance-and-troubleshooting.md

@@ -3,6 +3,7 @@
 ## How to see the current status of your services
 
 You can check the status of your services by using `systemctl status`. Example:
+
 ```
 sudo systemctl status matrix-nginx-proxy
 
@@ -12,11 +13,11 @@ sudo systemctl status matrix-nginx-proxy
 ```
 
 You can see the logs by using journalctl. Example:
+
 ```
 sudo journalctl -fu matrix-synapse
 ```
 
-
 ## Increasing Synapse logging
 
 Because the [Synapse](https://github.com/matrix-org/synapse) Matrix server is originally very chatty when it comes to logging, we intentionally reduce its [logging level](https://docs.python.org/3/library/logging.html#logging-levels) from `INFO` to `WARNING`.
@@ -33,7 +34,10 @@ matrix_synapse_root_log_level: "INFO"
 
 Re-run the playbook after making these configuration changes.
 
-
 ## Postgres
 
 See the dedicated [PostgreSQL Maintenance](maintenance-postgres.md) documentation page.
+
+## Mxisd
+
+See the dedicated [Adjusting mxisd Identity Server configuration](configuring-playbook-mxisd.md) documentation page