fix(express-example): minor tweaks after #3205 (#3207)

Author: trentm

examples/express/package.json

@@ -19,7 +19,7 @@
     "tracing"
   ],
   "engines": {
-    "node": ">=14"
+    "node": "^18.19.0 || >=20.6.0"
   },
   "author": "OpenTelemetry Authors",
   "license": "Apache-2.0",

examples/express/src/server.ts

@@ -23,18 +23,17 @@ setupTracing('example-express-server');
 import * as express from 'express';
 import * as axios from 'axios';
 import { RequestHandler } from 'express';
-import type { Resource } from '@opentelemetry/resources';
 
 // Setup express
 const app = express();
 const PORT = 8080;
 
 const getCrudController = () => {
   const router = express.Router();
-  const resources: Resource[] = [];
-  router.get('/', (req, res) => res.send(resources));
+  const things: unknown[] = [];
+  router.get('/', (req, res) => res.send(things));
   router.post('/', (req, res) => {
-    resources.push(req.body);
+    things.push(req.body);
     return res.status(201).send(req.body);
   });
   return router;