Add info about custom health endpoint to Monitoring and Queue mode

Author: dariacodes

docs/hosting/logging-monitoring/monitoring.md

@@ -40,10 +40,17 @@ Access the endpoint:
 /// info | Feature availability
 The `/metrics` endpoint isn't available on n8n Cloud.
 ///
+
+## Customizing the health check endpoint
+
+You can customize the health check endpoint path using the `N8N_ENDPOINT_HEALTH` [environment variable](/hosting/configuration/environment-variables/endpoints.md). 
+
 <!-- vale off -->
-## Enable metrics and healthz for self-hosted n8n
+## Enable metrics and health checks for self-hosted n8n
 <!-- vale on -->
-The `/metrics` and `/healthz` endpoints are disabled by default. To enable them, configure your n8n instance:
+The `/metrics` endpoint is disabled by default. For the main n8n server, the health endpoint is always enabled. However, for worker servers in [queue mode](/hosting/scaling/queue-mode.md), the `/healthz` endpoint is disabled by default.
+
+To enable them, configure your n8n instance:
 
 ```shell
 # metrics

docs/hosting/scaling/queue-mode.md

@@ -123,6 +123,10 @@ Each worker process runs a server that exposes optional endpoints:
 - [credentials overwrite endpoint](/embed/configuration.md#credential-overwrites)
 - [`/metrics`](/hosting/configuration/configuration-examples/prometheus.md)
 
+/// note | Customizing health check endpoints
+You can customize the health check endpoint path using the [`N8N_ENDPOINT_HEALTH`](/hosting/configuration/environment-variables/endpoints.md) environment variable.
+///
+
 #### View running workers 
 
 /// info | Feature availability