Add KaTeX fonts to assets paths and precompile

config/application.rb

@@ -83,6 +83,7 @@ module Gitlab
     # Enable the asset pipeline
     config.assets.enabled = true
     config.assets.paths << Gemojione.images_path
+    config.assets.paths << "vendor/assets/fonts"
     config.assets.precompile << "*.png"
     config.assets.precompile << "print.css"
     config.assets.precompile << "notify.css"
@@ -108,6 +109,7 @@ module Gitlab
     config.assets.precompile << "lib/utils/*.js"
     config.assets.precompile << "lib/*.js"
     config.assets.precompile << "u2f.js"
+    config.assets.precompile << "vendor/assets/fonts/*"
 
     # Version of your assets, change this if you want to expire all your assets
     config.assets.version = '1.0'