I received an email a week ago advertising a free 1 year membership to Learnable.com - normally $144/yr, which includes various courses on HTML, CSS and programming plus books on the same subjects published by Sitepoint (they're awesome books!) - just for setting up New Relic with an app.
To keep things simple:
Once your app is sending/receiving tracking/analytics data in New Relic, you'll receive an email with a link to click to confirm you're human, followed a few hours later by a redeemable voucher for a 1 year free Learnable.com membership.
I'm a web designer/developer but have very limited experience with Node.JS so I probably won't be able to answer any technical questions - sorry!