Add a default web.config.

For now handle only expires

web.config

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <system.webServer>
+        <staticContent>
+            <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="14.00:00:00" />
+        </staticContent>
+    </system.webServer>
+</configuration>