Add GET /version endpoint returning package name and version

Reads name and version from package.json via require() and exposes them
at GET /version as { name, version }.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

index.js

@@ -0,0 +1,48 @@
+const express = require('express');
+const { name, version } = require('./package.json');
+
+const app = express();
+const PORT = 3000;
+
+app.use(express.json());
+
+let todos = [
+  { id: 1, title: 'Buy groceries', done: false },
+  { id: 2, title: 'Walk the dog', done: true },
+  { id: 3, title: 'Read a book', done: false },
+];
+
+let nextId = 4;
+
+app.get('/healthz', (req, res) => {
+  res.json({ ok: true });
+});
+
+app.get('/version', (req, res) => {
+  res.json({ name, version });
+});
+
+app.get('/todos', (req, res) => {
+  res.json(todos);
+});
+
+app.post('/todos', (req, res) => {
+  const { title } = req.body;
+  const todo = { id: nextId++, title, done: false };
+  todos.push(todo);
+  res.status(201).json(todo);
+});
+
+app.delete('/todos/:id', (req, res) => {
+  const id = parseInt(req.params.id, 10);
+  const index = todos.findIndex(t => t.id === id);
+  if (index === -1) {
+    return res.status(404).end();
+  }
+  todos.splice(index, 1);
+  res.status(204).end();
+});
+
+app.listen(PORT, () => {
+  console.log(`Server listening on http://localhost:${PORT}`);
+});