feat(monitoring): add pagerduty config

monitoring/alertmanager/config.yml

@@ -1,12 +1,18 @@
 global:
   resolve_timeout: 5m
 route:
-  receiver: "null"
+  receiver: "pagerduty"
   group_by:
-    - job
+    - alertname
   group_wait: 30s
   group_interval: 5m
   repeat_interval: 12h
+  # routes:
+  #   - receiver: "pagerduty"
 receivers:
-  - name: "null"
+  - name: "pagerduty"
+    pagerduty_configs:
+      - send_resolved: true
+        service_key: "1bc33606914b4e0ac1f28610737ed3e3"
+        url: "https://events.eu.pagerduty.com/generic/2010-04-15/create_event.json"