Nginx brotli compression

[axelstudios]

What's this PR do?

• Configures Nginx to automatically serve the pre-compressed .br versions of static assets if available
• Enables on-the-fly brotli compression for responses (replacing gzip)
• Moves the 5 font css files to a block that can be compressed without loading them individually
• Updates all translation files

How should this be manually tested?

• Run SEED via Nginx locally and:
  • Check that the responses show Content-Encoding: br
  • attempting to access an html file within the node_modules directory results in downloading the file rather than serving it (e.g. /static/node_modules/angular-dragula/index.html)
  • attempting to access a static seed html file serves it as text/html (e.g. /static/seed/partials/home.html)