[+Doc] ERROR: Kibana server not yet ready (elastic#111230)

Adds section to bottom of [Kibana start-up](https://www.elastic.co/guide/en/kibana/current/access.html#status) for `Kibana server is not ready yet` error since second top Elastic Discuss post last 30d ([specific](https://discuss.elastic.co/t/error-kibana-server-is-not-ready-yet/156834/21) & [general](https://discuss.elastic.co/t/kibana-server-is-not-ready-yet/241217)). Copying @markwalkom's work.

Co-authored-by: gchaps <[email protected]>

docs/setup/access.asciidoc

@@ -37,4 +37,21 @@ image::images/kibana-status-page-7_14_0.png[Kibana server status page]
 
 For JSON-formatted server status details, use the `localhost:5601/api/status` API endpoint. 
 
+[float]
+[[not-ready]]
+=== {kib} not ready
+
+If you receive an error that the {kib} `server is not ready`, check the following:
+
+* The {es} connectivity: 
++
+[source,sh]
+----
+`curl -XGET elasticsearch_ip_or_hostname:9200/`
+----
+* The {kib} logs:
+** Linux, DEB or RPM package: `/var/log/kibana/kibana.log`
+** Linux, tar.gz package: `$KIBANA_HOME/log/kibana.log`
+** Windows: `$KIBANA_HOME\log\kibana.log`
+* The health status of `.kibana*` indices