1. Instead of generating a whole unique early access page, create just the blob of HTML we want to insert into the Magnolia page [1]

[1] https://www.jboss.org/products/devstudio

https://github.com/jbdevstudio/jbdevstudio-product/blob/master/results/index-earlyaccess-template.html

2. Fix index.html template so it includes Central zip:

https://github.com/jbdevstudio/jbdevstudio-product/blob/master/results/index-internal-template.html