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/kubernetes-dashboard/deployment.yaml

@@ -0,0 +1,42 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: kubernetes-dashboard
+  namespace: kubernetes-dashboard
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      k8s-app: kubernetes-dashboard
+  template:
+    metadata:
+      labels:
+        k8s-app: kubernetes-dashboard
+    spec:
+      serviceAccountName: dashboard-admin
+      containers:
+      - name: kubernetes-dashboard
+        image: kubernetesui/dashboard:v2.7.0
+        imagePullPolicy: IfNotPresent
+        args:
+        - --auto-generate-certificates
+        ports:
+        - containerPort: 8443
+        livenessProbe:
+          httpGet:
+            path: /
+            port: 8443
+            scheme: HTTPS
+          initialDelaySeconds: 30
+          timeoutSeconds: 30
+        securityContext:
+          allowPrivilegeEscalation: false
+          readOnlyRootFilesystem: true
+          runAsNonRoot: true
+          runAsUser: 1001
+        volumeMounts:
+        - mountPath: /tmp
+          name: tmp-volume
+      volumes:
+      - name: tmp-volume
+        emptyDir: {}

apps/kubernetes-dashboard/ingress.yaml

@@ -0,0 +1,24 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: kubernetes-dashboard
+  namespace: kubernetes-dashboard
+  annotations:
+    nginx.ingress.kubernetes.io/backend-protocol: HTTPS
+spec:
+  ingressClassName: public
+  rules:
+  - host: k8s.alexandre-vazquez.internal
+    http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: kubernetes-dashboard
+            port:
+              number: 443
+  tls:
+  - hosts:
+    - k8s.alexandre-vazquez.internal
+    secretName: k8s-dashboard-tls

apps/kubernetes-dashboard/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: kubernetes-dashboard

apps/kubernetes-dashboard/rbac.yaml

@@ -0,0 +1,18 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: dashboard-admin
+  namespace: kubernetes-dashboard
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: dashboard-admin
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: cluster-admin
+subjects:
+- kind: ServiceAccount
+  name: dashboard-admin
+  namespace: kubernetes-dashboard

apps/kubernetes-dashboard/service.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: kubernetes-dashboard
+  namespace: kubernetes-dashboard
+spec:
+  ports:
+  - port: 443
+    targetPort: 8443
+  selector:
+    k8s-app: kubernetes-dashboard