refactoring: heap -> span

Game/NLog.config

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
+      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+
+    <targets>
+        <target name="logfile" xsi:type="File" fileName="logs/server-log-${shortdate}.log" layout="[${longdate}][${logger}][${level}] ${message} ${exception:format=ToString}" />
+        <target name="logconsole" xsi:type="Console" layout="[${date}][${logger}][${level}] ${message} ${exception:format=ToString}"/>
+    </targets>
+
+    <rules>
+        <logger name="*" minlevel="Trace" writeTo="logconsole" />
+        <logger name="*" minlevel="Trace" writeTo="logfile" />
+    </rules>
+</nlog>