Merge pull request #2282 from DFE-Digital/warn-log-level

Set Sidekiq log level to warning

config/initializers/sidekiq.rb

@@ -2,6 +2,9 @@
 
 url = ENV.fetch("REDIS_URL", "redis://localhost:6379/1")
 
-Sidekiq.configure_server { |config| config.redis = { url: } }
+Sidekiq.configure_server do |config|
+  config.redis = { url: }
+  config.logger.level = Logger::WARN
+end
 
 Sidekiq.configure_client { |config| config.redis = { url: } }