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

netbird/k8s/netbird.yaml

@@ -3,6 +3,8 @@ kind: Service
 metadata:
   name: netbird-server-service
   namespace: netbird
+  labels:
+    app: netbird-server
 spec:
   selector:
     app: netbird-server
@@ -11,6 +13,10 @@ spec:
       name: http
       targetPort: 80
       protocol: TCP
+    - port: 9090
+      name: metrics
+      targetPort: metrics
+      protocol: TCP
     - port: 3478
       name: stun
       targetPort: 3478
@@ -59,6 +65,9 @@ spec:
             - containerPort: 80
               name: http
               protocol: TCP
+            - containerPort: 9090
+              name: metrics
+              protocol: TCP
             - containerPort: 3478
               name: stun
               protocol: UDP