feat(metrics): collect Headscale, NetBird, Gitea and Immich metrics

netbird/k8s/servicemonitor.yaml

@@ -0,0 +1,16 @@
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: netbird-server
+  namespace: netbird
+  labels:
+    release: prometheus-stack
+spec:
+  selector:
+    matchLabels:
+      app: netbird-server
+  endpoints:
+    - port: metrics
+      path: /metrics
+      interval: 30s
+      scrapeTimeout: 10s