Disable CORS logging by default in development (#6592)

* Disable CORS logging by default in development

* Fix typos

config/application.rb

@@ -61,7 +61,8 @@ module PracticalDeveloper
 
     # Enable CORS for API v0
     # (logging is only activated when debug is enabled)
-    config.middleware.insert_before 0, Rack::Cors, debug: Rails.env.development?, logger: (-> { Rails.logger }) do
+    debug_cors = ENV["DEBUG_CORS"].present? ? true : false
+    config.middleware.insert_before 0, Rack::Cors, debug: debug_cors, logger: (-> { Rails.logger }) do
       allow do
         origins do |source, _env|
           source # echo back the client's `Origin` header instead of using `*`

docs/troubleshooting.md

@@ -80,3 +80,12 @@ end
 If instead you want to tune the Elasticsearch disk allocator's settings, please
 refer to
 [Disk-based shard allocation](https://www.elastic.co/guide/en/elasticsearch/reference/current/disk-allocator.html#disk-allocator).
+
+## CORS
+
+If you are experiencing CORS issues locally or need to display more information
+about the CORS headers, add the following variable to your `application.yml`:
+
+```yml
+DEBUG_CORS: true
+```