add Sentry docs and onperm

diagrams/onprem/monitoring.py

@@ -24,6 +24,10 @@ class Prometheus(_Monitoring):
     _icon = "prometheus.png"
 
 
+class Sentry(_Monitoring):
+    _icon = "sentry.png"
+
+
 class Splunk(_Monitoring):
     _icon = "splunk.png"
 

docs/nodes/onprem.md

@@ -101,6 +101,7 @@ Node classes list of onprem provider.
 - **diagrams.onprem.monitoring.Grafana**
 - **diagrams.onprem.monitoring.Kibana**
 - **diagrams.onprem.monitoring.Prometheus**
+- **diagrams.onprem.monitoring.Sentry**
 - **diagrams.onprem.monitoring.Splunk**
 - **diagrams.onprem.monitoring.Thanos**