Creating web-based presentations has never been easier now that org-revel is just an option in the org layer for Spacemacs. By adding a variable to the org layer in the Spacemacs configuration and setting the location of Reveal.js on your file space you are ready to convert
.org files into lovely presentations.
You can see examples of my presentations at http://jr0cket.co.uk/slides
If you have not used org-reveal before, see my previous articles on creating cool slides with Emacs Org-mode and Org-reveal, please note that article has an older configuration. If you have not experienced the amazing Org-mode, then see how to manage your developer life with this amazing tool.