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

headscale/k8s/vmservicescrape.yaml

@@ -0,0 +1,18 @@
+apiVersion: operator.victoriametrics.com/v1beta1
+kind: VMServiceScrape
+metadata:
+  name: headscale
+  namespace: headscale
+  labels:
+    release: prometheus-stack
+spec:
+  # The external Service has a manually managed EndpointSlice, not Endpoints.
+  discoveryRole: endpointslice
+  selector:
+    matchLabels:
+      app: headscale
+  endpoints:
+    - port: metrics
+      path: /metrics
+      interval: 30s
+      scrapeTimeout: 10s