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>

deploy-k8s.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+# Deploy whalehunting to Kubernetes via ArgoCD
+# Prerequisites:
+# 1. Create repo in Gitea: git.kube2.tricnet.de/admin/whalehunting
+# 2. Push this repo to Gitea
+# 3. Run this script to create the ArgoCD application
+
+set -e
+
+GITEA_URL="git.kube2.tricnet.de"
+REPO_NAME="whalehunting"
+IMAGE_TAG="${1:-latest}"
+
+echo "=== Whalehunting Kubernetes Deployment ==="
+echo ""
+
+# Step 1: Build and push Docker image to Gitea registry
+echo "1. Building Docker image..."
+docker build -t ${GITEA_URL}/admin/${REPO_NAME}:${IMAGE_TAG} .
+
+echo ""
+echo "2. Pushing image to Gitea registry..."
+echo "   (You may need to: docker login ${GITEA_URL})"
+docker push ${GITEA_URL}/admin/${REPO_NAME}:${IMAGE_TAG}
+
+echo ""
+echo "3. Updating image tag in kustomization.yaml..."
+sed -i "s/newTag: .*/newTag: ${IMAGE_TAG}/" k8s/kustomization.yaml
+
+echo ""
+echo "4. Committing and pushing to Gitea..."
+git add -A
+git commit -m "deploy: update image to ${IMAGE_TAG}" || echo "No changes to commit"
+git push origin master
+
+echo ""
+echo "5. Creating/updating ArgoCD application..."
+ssh root@kube2.tricnet.de "kubectl apply -f -" < k8s/argocd-application.yaml
+
+echo ""
+echo "=== Deployment initiated ==="
+echo "ArgoCD will sync automatically."
+echo ""
+echo "Check status:"
+echo "  ssh root@kube2.tricnet.de 'kubectl get application whalehunting -n argocd'"
+echo ""
+echo "Game URL: https://whalehunting.kube2.tricnet.de"