update(app): add examples and README file

examples/k8s/deployment.yaml

@@ -0,0 +1,39 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: metalcheck-backend
+  labels:
+    app: metalcheck
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: metalcheck
+  template:
+    metadata:
+      labels:
+        app: metalcheck
+    spec:
+      containers:
+      - name: backend
+        image: <your-ecr-repo>:latest
+        ports:
+        - containerPort: 8000
+        env:
+        - name: KUBERNETES_SERVICE_HOST
+          value: "kubernetes.default"
+        - name: KUBERNETES_SERVICE_PORT
+          value: "443"
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: metalcheck-backend
+spec:
+  selector:
+    app: metalcheck
+  ports:
+    - protocol: TCP
+      port: 80
+      targetPort: 8000
+  type: LoadBalancer

examples/k8s/rbac.yaml

@@ -0,0 +1,29 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: metalcheck-sa
+  namespace: metalcheck
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  namespace: metalcheck
+  name: metalcheck-role
+rules:
+- apiGroups: [""]
+  resources: ["pods", "nodes", "namespaces"]
+  verbs: ["get", "list", "watch"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: metalcheck-rolebinding
+  namespace: metalcheck
+subjects:
+- kind: ServiceAccount
+  name: metalcheck-sa
+  namespace: metalcheck
+roleRef:
+  kind: Role
+  name: metalcheck-role
+  apiGroup: rbac.authorization.k8s.io