Update copy on eBook and title

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Author: alexellis

_layouts/page.html

@@ -25,11 +25,12 @@ <h2 class="subtitle is-size-4">
 	</section>
 
 	<section class="gumroad-cta">
-		<h3 class="gumroad-cta-title">Checkout the new OpenFaaS new eBook and video workshop</h3>
+		<h3 class="gumroad-cta-title">Checkout the official eBook and video workshop for OpenFaaS</h3>
 			<a href="https://gumroad.com/l/serverless-for-everyone-else">
 			<img src="https://static-2.gumroad.com/res/gumroad/2028406193591/asset_previews/714aad765f8246463fafb64fcd3be4ea/retina/104810333-b628f280-57eb-11eb-8be9-a2f6c773346b.png" alt="Serverless eBook cover">
 			</a>
-			<p>Learn how to deploy and run self-hosted, open-source serverless functions and automate your workflows with Node.js</p>
+			<p>Learn use-cases for open-source serverless functions and how to integrate them into your existing workflows.</p>
+			<p>Through the hands-on exercises you will build your own JavaScript functions using Node.js. You'll add custom npm modules, integrate with other HTTP APIs, enable authentication and monitor the endpoints with Grafana.</p>
 			<p>
 				<a href="https://gumroad.com/l/serverless-for-everyone-else">Find out more on Gumroad</a>
 			</p>