add logger handler

config/sys-dev.config

@@ -28,7 +28,20 @@
           level => debug,
           formatter => {logger_formatter, #{template => [time, " [", level, "] ", msg, "\n"]}}
         }
+      },
+
+      {handler, disk, logger_disk_log_h,
+        #{
+          level => debug,
+          config => #{
+            file => "log/debug.log",
+            max_no_files => 10,
+            max_no_bytes => 524288000
+          },
+          formatter => {logger_formatter, #{template => [time, " [", level, "] ", msg, "\n"]}}
+        }
       }
+
     ]}
   ]}