chore: Add missing bits to otel example (#313)

Author: jsumners-nr

Diff for: opentelemetry-example/README.md

@@ -6,6 +6,10 @@ This is an example app that uses the [New Relic agent](https://github.com/newrel
 
 **Note**: This is used to demonstrate behavior between the New Relic Node.js agent in opentelemetry bridge.
 
+Requirements:
+  + Node.js >= 20.6.0
+
+
 ```sh
 npm install
 cp env.sample .env

Diff for: opentelemetry-example/package.json

@@ -26,6 +26,7 @@
     "body-parser": "^1.20.3",
     "express": "^4.21.0",
     "knex": "^3.1.0",
+    "newrelic": "^12.14.0",
     "pg": "^8.12.0"
   }
 }