Stage Mumble in its dedicated namespace

bootstrap/project.yaml

@@ -17,6 +17,8 @@ spec:
     server: https://kubernetes.default.svc
   - namespace: wiki-js
     server: https://kubernetes.default.svc
+  - namespace: mumble
+    server: https://kubernetes.default.svc
   namespaceResourceWhitelist:
   - group: ""
     kind: ConfigMap
@@ -46,3 +48,7 @@ spec:
     kind: Middleware
   - group: bitnami.com
     kind: SealedSecret
+  - group: postgresql.cnpg.io
+    kind: Cluster
+  - group: cert-manager.io
+    kind: Certificate