Use CDN to serve files in site folder referenced by template

[davidmerfield]

The problem is file serving from the EBS disk via node is really slow.

The goal is to avoid people putting fonts in their site folder then embedding them in a template. We want these requests to go through the CDN where possible

• We could do something at the render middleware which retrieved a full list of folder urls and if there's a match, add the cdn origin and a hash parameters
  • maybe use a fast html parser (parse5?) rather than a regex
  • to make this work we maybe need to use the metadata model to store a modified time, content hash, etc
• Ensure the correct access control origin headers are set by the CDN for these files so fonts still work