Since the current tutorial is currently composed of many distinct asciidoc documents, we cannot use the asciidoctor tool chain to generate a PDF.
We should create an index.adoc with include directives to all documents in order to create a single asciidoctor document that can be used to generate a PDF.
This file shouldn't be outside of src/main/jbake/content so that it's not included in the jbake output.
The asciidoctor maven plugin can be use to render the PDF, see https://github.com/asciidoctor/asciidoctor-maven-examples/tree/master/asciidoctor-pdf-example