feature(appengine): Update quickstart samples to Nodejs24 (#4192)

* Update quickstart samples to Nodejs24

* Delete appengine/building-an-app/build/.gcloudignore

---------

Co-authored-by: Jennifer Davis <[email protected]>

Author: srinjoyray

appengine/building-an-app/build/app.yaml

@@ -12,5 +12,5 @@
 # limitations under the License.
 
 # [START gae_build_app_yaml_node]
-runtime: nodejs20
+runtime: nodejs24
 # [END gae_build_app_yaml_node]

appengine/building-an-app/build/package.json

@@ -14,7 +14,7 @@
     "url": "https://github.com/GoogleCloudPlatform/nodejs-docs-samples.git"
   },
   "engines": {
-    "node": "20.x.x"
+    "node": "24.x.x"
   },
   "author": "Google Inc.",
   "license": "Apache-2.0",

appengine/hello-world/flexible/app.yaml

@@ -16,7 +16,7 @@
 runtime: nodejs
 env: flex
 runtime_config:
-  operating_system: ubuntu22
+  operating_system: ubuntu24
 # This sample incurs costs to run on the App Engine flexible environment.
 # The settings below are to reduce costs during testing and are not appropriate
 # for production use. For more information, see: