Merge pull request #908 from dynamsoft-docs/preview

update to internal commit 27f43122

Author: Tom-Dynamsoft

web.config

@@ -233,6 +233,12 @@
           <conditions logicalGrouping="MatchAll" trackAllCaptures="false" />
             <action type="Redirect" url="{HTTP_POST}/web-twain/docs//extended-usage/restful-api.html" appendQueryString="false" logRewrittenUrl="false" />
         </rule>
+
+        <rule name="Redirect image export guide https://www.dynamsoft.com/web-twain/docs/about/index.html" enabled="true" patternSyntax="ECMAScript">
+          <match url="about/index.html" ignoreCase="true" negate="false" />
+          <conditions logicalGrouping="MatchAll" trackAllCaptures="false" />
+            <action type="Redirect" url="{HTTP_POST}/web-twain/docs/introduction/index.html" appendQueryString="false" logRewrittenUrl="false" />
+        </rule>
       </rules>
     </rewrite>
   </system.webServer>