web.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <system.webServer>
    <handlers>
      <add name="iisnode" path="app.js" verb="*" modules="iisnode"/>
    </handlers>
    <rewrite>
      <rules>
        <rule name="StaticContentApp" stopProcessing="true">
          <match url="^app/.*$" />
          <conditions>
            <add input="{REQUEST_URI}" matchType="IsFile"/>
          </conditions>
          <action type="Rewrite" url="{REQUEST_URI}"/>
        </rule>
        <rule name="StaticContentNodeModules" stopProcessing="true">
          <match url="^node_modules/.*$" />
          <conditions>
            <add input="{REQUEST_URI}" matchType="IsFile"/>
          </conditions>
          <action type="Rewrite" url="{REQUEST_URI}"/>
        </rule>
        <rule name="DynamicContent">
          <action type="Rewrite" url="app.js"/>
        </rule>
      </rules>
    </rewrite>

    <!-- 'bin' directory has no special meaning in node.js and apps can be placed in it -->
    <security>
      <requestFiltering>
        <hiddenSegments>
          <remove segment="bin"/>
        </hiddenSegments>
      </requestFiltering>
    </security>

    <!-- Make sure error responses are left untouched -->
    <httpErrors existingResponse="PassThrough" />
    <iisnode watchedFiles="web.config;*.js" node_env="production"/>
  </system.webServer>
</configuration>