REMARKS:
the file: src/main/resources/document.html.slim contains a copy oif the original version of the file in the asciidoctor-reveal.js-{version}/templates directory.
However we add two sets of divs in order to position logos. Additionally we add some CSS imports for c3, d3 libraries. All added blocks are wrapped in:
/ START ADDED For Apache Training
And
/ END ADDED For Apache Training
When updating the ascidoctor-revealjs version, this file needs to be updated too.