chore(examples): lint examples/host-metrics using shared top-level eslint config (#2901)

Refs: #2891

Author: trentm

examples/host-metrics/.eslintrc.js

@@ -0,0 +1,26 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ *
+ * 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.
+ */
+
+'use strict';
+
+const baseConfig = require('../../eslint.config');
+
+module.exports = {
+  ...baseConfig,
+  env: {
+    node: true,
+  },
+};

examples/host-metrics/.npmrc

@@ -0,0 +1 @@
+package-lock=false

examples/host-metrics/node.js

@@ -1,9 +1,27 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ *
+ * 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.
+ */
+
 'use strict';
 
 const { HostMetrics } = require('@opentelemetry/host-metrics');
 // const { PrometheusExporter } = require('@opentelemetry/exporter-prometheus');
 const { MeterProvider } = require('@opentelemetry/sdk-metrics-base');
-const { CollectorMetricExporter } = require('@opentelemetry/exporter-collector');
+const {
+  CollectorMetricExporter,
+} = require('@opentelemetry/exporter-collector');
 
 const exporter = new CollectorMetricExporter({
   headers: {},
@@ -26,10 +44,13 @@ const meterProvider = new MeterProvider({
   interval: 2000,
 });
 
-const hostMetrics = new HostMetrics({ meterProvider, name: 'example-host-metrics' });
+const hostMetrics = new HostMetrics({
+  meterProvider,
+  name: 'example-host-metrics',
+});
 hostMetrics.start();
 
 // keep running
 (function wait() {
   setTimeout(wait, 1000);
-}());
+})();

examples/host-metrics/package.json

@@ -5,6 +5,8 @@
   "description": "Example of using @opentelemetry/host-metrics",
   "main": "index.js",
   "scripts": {
+    "lint": "eslint . --ext=ts,js,mjs",
+    "lint:fix": "eslint . --ext=ts,js,mjs --fix",
     "start": "node node.js"
   },
   "repository": {