chore(bootstrap): Added mailu to argocd

clusters/artemis/apps/mailu/app-project.yaml

@@ -0,0 +1,17 @@
+---
+apiVersion: argoproj.io/v1alpha1
+kind: AppProject
+metadata:
+  name: mailu
+spec:
+  description: Mailserver
+  sourceRepos:
+    - '*'
+  sourceNamespaces:
+    - '*'
+  destinations:
+    - namespace: 'mailu'
+      server: '*'
+  clusterResourceWhitelist:
+    - group: '*'
+      kind: '*'