feat: add GitOps structure for kubernetes-dashboard, n8n, xslt-lab

- apps/kubernetes-dashboard: raw manifests (namespace, rbac, deployment, service, ingress)
- apps/n8n: Helm values referencing existing n8n-postgresql secret (no password in git)
- apps/xslt-lab: Helm values for xslt-playground chart
- argocd/applications: ArgoCD Application CRDs for all three apps

apps/n8n/values.yaml

@@ -0,0 +1,56 @@
+defaultLocale: en
+timezone: Europe/Berlin
+
+db:
+  type: postgresdb
+
+externalPostgresql:
+  host: 192.168.1.29
+  port: 5432
+  database: pgd_n8n
+  username: pgu_n8n
+  existingSecret: n8n-postgresql
+  # secret must have key: postgres-password
+
+diagnostics:
+  enabled: false
+
+versionNotifications:
+  enabled: false
+
+main:
+  extraEnvVars:
+    N8N_EDITOR_BASE_URL: https://n8n.alexandre-vazquez.cloud
+
+ingress:
+  enabled: true
+  className: public
+  hosts:
+  - host: n8n.alexandre-vazquez.cloud
+    paths:
+    - path: /
+      pathType: ImplementationSpecific
+
+service:
+  type: ClusterIP
+  port: 5678
+
+image:
+  repository: n8nio/n8n
+  tag: "1.111.1"
+  pullPolicy: IfNotPresent
+
+podSecurityContext:
+  fsGroup: 1000
+  fsGroupChangePolicy: OnRootMismatch
+
+securityContext:
+  allowPrivilegeEscalation: false
+  capabilities:
+    drop:
+    - ALL
+  privileged: false
+  readOnlyRootFilesystem: false
+  runAsGroup: 1000
+  runAsNonRoot: true
+  runAsUser: 1000