feat: CI/CD workflow, Dockerfile, and K8s deployment

- Multi-stage Dockerfile (Maven + Node build, JRE runtime)
- Gitea Actions CI: build → docker → deploy
- K8s manifests: Deployment, Service (NodePort 30082), Ingress
- ServiceAccount + RBAC for kubectl access from pod
- Docker socket mount for image builds
- Ingress at deploy.cameleer.siegeln.net
- SPA config for serving frontend from Spring Boot
- cameleer-demo namespace for deployed apps

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

deploy/deploy-demo.yaml

@@ -0,0 +1,143 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: cameleer-demo
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: cameleer-deploy-demo
+  namespace: cameleer
+  labels:
+    app: cameleer-deploy-demo
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: cameleer-deploy-demo
+  template:
+    metadata:
+      labels:
+        app: cameleer-deploy-demo
+    spec:
+      imagePullSecrets:
+        - name: gitea-registry
+      serviceAccountName: cameleer-deployer
+      containers:
+        - name: deploy-demo
+          image: gitea.siegeln.net/cameleer/cameleer-deploy-demo:latest
+          ports:
+            - containerPort: 8082
+          env:
+            - name: CAMELEER_SERVER_URL
+              value: "http://cameleer3-server.cameleer.svc:8081"
+            - name: CAMELEER_BOOTSTRAP_TOKEN
+              valueFrom:
+                secretKeyRef:
+                  name: cameleer-auth
+                  key: CAMELEER_AUTH_TOKEN
+            - name: CAMELEER_REGISTRY
+              value: "gitea.siegeln.net/cameleer/demo-apps"
+            - name: CAMELEER_AGENT_MAVEN_URL
+              value: "https://gitea.siegeln.net/api/packages/cameleer/maven/com/cameleer3/cameleer3-agent/1.0-SNAPSHOT/cameleer3-agent-1.0-SNAPSHOT.jar"
+            - name: CAMELEER_DEMO_NAMESPACE
+              value: "cameleer-demo"
+            - name: CAMELEER_SERVER_UI
+              value: "http://192.168.50.86:30090"
+            - name: DOCKER_HOST
+              value: "unix:///var/run/docker.sock"
+          volumeMounts:
+            - name: docker-sock
+              mountPath: /var/run/docker.sock
+            - name: kubectl-config
+              mountPath: /root/.kube
+              readOnly: true
+          resources:
+            requests:
+              memory: "256Mi"
+              cpu: "100m"
+            limits:
+              memory: "512Mi"
+              cpu: "500m"
+          livenessProbe:
+            httpGet:
+              path: /api/apps
+              port: 8082
+            initialDelaySeconds: 20
+            periodSeconds: 10
+          readinessProbe:
+            httpGet:
+              path: /api/apps
+              port: 8082
+            initialDelaySeconds: 10
+            periodSeconds: 5
+      volumes:
+        - name: docker-sock
+          hostPath:
+            path: /var/run/docker.sock
+        - name: kubectl-config
+          secret:
+            secretName: deployer-kubeconfig
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: cameleer-deploy-demo
+  namespace: cameleer
+spec:
+  type: NodePort
+  selector:
+    app: cameleer-deploy-demo
+  ports:
+    - port: 8082
+      targetPort: 8082
+      nodePort: 30082
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: cameleer-deployer
+  namespace: cameleer
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: cameleer-deployer
+rules:
+  - apiGroups: ["apps"]
+    resources: ["deployments"]
+    verbs: ["get", "list", "create", "update", "patch", "delete"]
+  - apiGroups: [""]
+    resources: ["pods", "services", "namespaces"]
+    verbs: ["get", "list", "create", "delete"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: cameleer-deployer
+subjects:
+  - kind: ServiceAccount
+    name: cameleer-deployer
+    namespace: cameleer
+roleRef:
+  kind: ClusterRole
+  name: cameleer-deployer
+  apiGroup: rbac.authorization.k8s.io
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: cameleer-deploy-demo
+  namespace: cameleer
+spec:
+  rules:
+    - host: deploy.cameleer.siegeln.net
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: cameleer-deploy-demo
+                port:
+                  number: 8082