Add central services managed by dNation

Fixes SovereignCloudStack/issues#516

Signed-off-by: Roman Hros <roman.hros@dnation.cloud>

community/central-services/plusserver-gx-scs.md

@@ -0,0 +1,64 @@
+# Central services
+
+This document gives an overview of what SCS central services are deployed and who is responsible for them in plusserver gx-scs infrastructure.
+
+## Project p500924-harbor
+
+### K8s clusters
+
+#### Harbor
+
+Responsibility: [@SovereignCloudStack/vp06c](https://github.com/orgs/SovereignCloudStack/teams/vp06c)
+
+Services:
+
+- SCS Registry <https://registry.scs.community/>
+  - [k8s-harbor](https://github.com/SovereignCloudStack/k8s-harbor/tree/main/envs/public)
+
+Utilization:
+
+- Instances: 7
+- VCPUs: 32
+- RAM: 64GB
+
+Spec:
+
+- version: v6.0.0 - R5
+- management cluster:
+  - 1 instance: SCS-2V:4:20
+  - image: Ubuntu 22.04 (20230416)
+  - k8s: v1.25.3 - KinD
+- workload cluster:
+  - 6 instances:
+    - 3 control-planes: SCS-2V:4:20
+    - 3 workers: SCS-8V:16:100
+  - image: ubuntu-capi-image-v1.27.5
+  - k8s: v1.27.5
+
+#### Monitoring
+
+Responsibility: [@SovereignCloudStack/vp06c](https://github.com/orgs/SovereignCloudStack/teams/vp06c)
+
+Services:
+
+- [k8s-observability](https://github.com/SovereignCloudStack/k8s-observability)
+
+Utilization:
+
+- Instances: 7
+- VCPUs: 32
+- RAM: 64GB
+
+Spec:
+
+- version: v6.0.0 - R5
+- management cluster:
+  - 1 instance: SCS-2V:4:20
+  - image: Ubuntu 22.04 (20231010)
+  - k8s: v1.27.3 - KinD
+- workload cluster:
+  - 6 instances:
+    - 3 control-planes: SCS-2V:4:20
+    - 3 workers: SCS-8V:16:100
+  - image: ubuntu-capi-image-v1.27.5
+  - k8s: v1.27.5