This repo is deprecated see atila-rendertron.
This repo was used to configure a Google App Engine instance running Rendertron to allow us to prerender our app.
See this tutorial for more context: https://angularfirebase.com/lessons/seo-angular-part-1-rendertron-meta-tags/
It has now been deprecated and replaced with: https://github.com/ademidun/atila-rendertron