Improve logging

lib/diversipub/main.rb

@@ -65,10 +65,10 @@ module Diversipub
 
     def webrick_options
       @webrick_options ||= {
-        AccessLog: [],
+        AccessLog: webrick_access_log,
         BindAddress: 'localhost',
         DocumentRoot: nil,
-        Logger: Logger.new(File.open('/dev/null', 'w')),
+        Logger: web_logger,
         Port: 8080,
       }.freeze
     end
@@ -80,5 +80,17 @@ module Diversipub
     def sinatra_app
       @sinatra_app ||= SinatraApp.new self
     end
+
+    def webrick_access_log
+      @webrick_access_log ||= [
+        [$stderr, WEBrick::AccessLog::COMMON_LOG_FORMAT],
+      ].freeze
+    end
+
+    def web_logger
+      @web_logger ||= Logger.new(stderr).tap do |web_logger|
+        web_logger.level = Logger::INFO
+      end
+    end
   end
 end