feat: add Kubernetes deployment with ArgoCD

- Add k8s/ manifests (Deployment, Service, Ingress)
- Use Kustomize for configuration
- ArgoCD application for GitOps deployment
- Traefik ingress with Let's Encrypt TLS
- Deploy script for CI/CD workflow

Deploys to: https://whalehunting.kube2.tricnet.de

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

k8s/ingress.yaml

@@ -0,0 +1,26 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: whalehunting
+  namespace: whalehunting
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt-prod
+  labels:
+    app.kubernetes.io/name: whalehunting
+spec:
+  ingressClassName: traefik
+  rules:
+    - host: whalehunting.kube2.tricnet.de
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: whalehunting
+                port:
+                  name: http
+  tls:
+    - hosts:
+        - whalehunting.kube2.tricnet.de
+      secretName: whalehunting-tls