enh/upgrade test with claude skeleton

.github/workflows/build.yaml

@@ -17,5 +17,6 @@ jobs:
           node-version: 20
           cache: 'npm'
           cache-dependency-path: package-lock.json
-      - run: npm ci
+      - run: ls -Rla /home/runner/.npm
+      - run: npm ci --loglevel verbose
       - run: npm test

index.js

@@ -0,0 +1,23 @@
+const express = require('express');
+const moment = require('moment');
+const _ = require('lodash');
+
+const app = express();
+const port = 3000;
+
+app.get('/', (req, res) => {
+  const currentTime = moment().format('MMMM Do YYYY, h:mm:ss a');
+  const numbers = _.range(1, 6);
+  const squared = _.map(numbers, n => n * n);
+
+  // test
+  res.json({
+    message: "Hello from CI Cache Test!",
+    time: currentTime,
+    numbers: squared
+  });
+});
+
+app.listen(port, () => {
+  console.log(`App listening at http://localhost:${port}`);
+});