[DO-1431] add mermaid (!14)

[DO-1431]

Co-authored-by: denis.patrakeev <denis.patrakeev@avroid.tech>
Reviewed-on: https://git.avroid.tech/K8s/k8s-configs/pulls/14

clusters/k8s-avroid-office.prod.local/namespaces/mermaid/kustomize/mermaid-service.yaml

@@ -0,0 +1,18 @@
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: mermaid
+  labels:
+    app.kubernetes.io/name: mermaid
+    app.kubernetes.io/instance: mermaid
+spec:
+  type: ClusterIP
+  ports:
+    - name: http
+      protocol: TCP
+      port: 80
+      targetPort: 80
+  selector:
+    app.kubernetes.io/name: mermaid
+    app.kubernetes.io/instance: mermaid