feat: add hello world deployment example (#1854)

examples/hello_world/config.yaml

@@ -31,6 +31,6 @@ Middle:
 Backend:
   message: "mars"
   ServiceArgs:
-    workers: 2
+    workers: 1
     resources:
       cpu: "1"

examples/hello_world/deploy/hello_world.yaml

+# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+apiVersion: nvidia.com/v1alpha1
+kind: DynamoGraphDeployment
+metadata:
+  name: hello-world
+spec:
+  services:
+    Frontend:
+      dynamoNamespace: hello-world
+      componentType: main
+      replicas: 1
+      resources:
+        requests:
+          cpu: "1"
+          memory: "2Gi"
+        limits:
+          cpu: "1"
+          memory: "2Gi"
+      extraPodSpec:
+        mainContainer:
+          image: nvcr.io/nvidia/ai-dynamo/vllm-runtime:0.3.1
+          workingDir: /workspace/examples/hello_world
+          args:
+            - dynamo
+            - serve
+            - hello_world:Frontend
+            - --system-app-port
+            - "5000"
+            - --enable-system-app
+            - --use-default-health-checks
+            - --service-name
+            - Frontend
+            - -f
+            - ./config.yaml
+    Middle:
+      dynamoNamespace: hello-world
+      replicas: 1
+      resources:
+        requests:
+          cpu: "1"
+          memory: "2Gi"
+        limits:
+          cpu: "1"
+          memory: "2Gi"
+      extraPodSpec:
+        mainContainer:
+          image: nvcr.io/nvidia/ai-dynamo/vllm-runtime:0.3.1
+          workingDir: /workspace/examples/hello_world
+          args:
+            - dynamo
+            - serve
+            - hello_world:Middle
+            - --system-app-port
+            - "5000"
+            - --enable-system-app
+            - --use-default-health-checks
+            - --service-name
+            - Middle
+            - -f
+            - ./config.yaml
+    Backend:
+      dynamoNamespace: hello-world
+      replicas: 1
+      resources:
+        requests:
+          cpu: "1"
+          memory: "2Gi"
+        limits:
+          cpu: "1"
+          memory: "2Gi"
+      extraPodSpec:
+        mainContainer:
+          image: nvcr.io/nvidia/ai-dynamo/vllm-runtime:0.3.1
+          workingDir: /workspace/examples/hello_world
+          args:
+            - dynamo
+            - serve
+            - hello_world:Backend
+            - --system-app-port
+            - "5000"
+            - --enable-system-app
+            - --use-default-health-checks
+            - --service-name
+            - Backend
+            - -f
+            - ./config.yaml