feat: Update minimum supported Node version to Node 20

FUTURE_COPYBARA_INTEGRATE_REVIEW=#596 from googleapis:release-please--branches--main--components--vertexai 489440d
PiperOrigin-RevId: 899095779

Author: sararob

.kokoro/presubmit/node22/docs.cfg

@@ -0,0 +1,16 @@
+# doc publications use a Python image.
+env_vars: {
+    key: "TRAMPOLINE_IMAGE"
+    value: "gcr.io/cloud-devrel-kokoro-resources/node:18-user"
+}
+
+# Download trampoline resources.
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
+
+# Use the trampoline script to run in docker.
+build_file: "nodejs-vertexai/.kokoro/trampoline_v2.sh"
+
+env_vars: {
+    key: "TRAMPOLINE_BUILD_FILE"
+    value: "github/nodejs-vertexai/.kokoro/presubmit/node22/docs.sh"
+}

.kokoro/presubmit/node22/docs.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+
+# Copyright 2023 Google LLC
+#
+# 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
+#
+#     https://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.
+#
+
+set -eo pipefail
+
+if [[ -z "$CREDENTIALS" ]]; then
+  # if CREDENTIALS are explicitly set, assume we're testing locally
+  # and don't set NPM_CONFIG_PREFIX.
+  export NPM_CONFIG_PREFIX=${HOME}/.npm-global
+  export PATH="$PATH:${NPM_CONFIG_PREFIX}/bin"
+  cd $(dirname $0)/../..
+fi
+
+npm install
+npm install --no-save @google-cloud/cloud-rad@^0.4.0
+
+# Switch to 'fail at end' to allow tar command to complete before exiting.
+set +e
+
+# publish docs to devsite
+NO_UPLOAD=1 npx @google-cloud/cloud-rad . cloud-rad
+
+tar cvfz docs.tar.gz yaml
+
+if [[ $EXIT -ne 0 ]]; then
+  echo -e "\n Generate docs failed: npx returned a non-zero exit code. \n"
+  exit $EXIT
+fi
+
+set -e

.kokoro/release/docs-devsite.cfg

@@ -11,7 +11,7 @@ before_action {
 # doc publications use a Python image.
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
-    value: "us-central1-docker.pkg.dev/cloud-sdk-release-custom-pool/release-images/node18"
+    value: "us-central1-docker.pkg.dev/client-library-releases/release-images-prod/node22@sha256:036e3bd61ff8c9a5990695f6a8d63db9f1867e78007baf23ef53d361413123e1"
 }
 
 # Download trampoline resources.

.kokoro/release/docs.cfg

@@ -11,7 +11,7 @@ before_action {
 # doc publications use a Python image.
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
-    value: "us-central1-docker.pkg.dev/cloud-sdk-release-custom-pool/release-images/node18"
+    value: "us-central1-docker.pkg.dev/client-library-releases/release-images-prod/node22@sha256:036e3bd61ff8c9a5990695f6a8d63db9f1867e78007baf23ef53d361413123e1"
 }
 
 # Download trampoline resources.

.kokoro/release/publish.cfg

@@ -30,7 +30,7 @@ build_file: "nodejs-vertexai/.kokoro/trampoline_v2.sh"
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
-    value: "us-central1-docker.pkg.dev/cloud-sdk-release-custom-pool/release-images/node18"
+    value: "us-central1-docker.pkg.dev/client-library-releases/release-images-prod/node22@sha256:036e3bd61ff8c9a5990695f6a8d63db9f1867e78007baf23ef53d361413123e1"
 }
 
 env_vars: {

.kokoro/test.sh

@@ -39,7 +39,7 @@ npm test
 
 # codecov combines coverage across integration and unit tests. Include
 # the logic below for any environment you wish to collect coverage for:
-COVERAGE_NODE=14
+COVERAGE_NODE=22
 if npx check-node-version@3.3.0 --silent --node $COVERAGE_NODE; then
   NYC_BIN=./node_modules/nyc/bin/nyc.js
   if [ -f "$NYC_BIN" ]; then

README.md

@@ -24,7 +24,7 @@ page in Vertex AI documentation.
 
 ## Before you begin
 
-1.  Make sure your node.js version is 18 or above.
+1.  Make sure your node.js version is 20 or above.
 1.  [Select](https://console.cloud.google.com/project) or [create](https://cloud.google.com/resource-manager/docs/creating-managing-projects#creating_a_project) a Google Cloud project.
 1.  [Enable billing for your project](https://cloud.google.com/billing/docs/how-to/modify-project).
 1.  [Enable the Vertex AI API](https://console.cloud.google.com/flows/enableapi?apiid=aiplatform.googleapis.com).

package.json

@@ -5,7 +5,7 @@
   "license": "Apache-2.0",
   "author": "Google LLC",
   "engines": {
-    "node": ">=18.0.0"
+    "node": ">=20.0.0"
   },
   "homepage": "https://github.com/googleapis/nodejs-vertexai",
   "repository": "googleapis/nodejs-vertexai",