web.config

<configuration>
  <system.webServer>
    <handlers>
      <add name="iisnode" path="app.js" verb="*" modules="iisnode" />
    </handlers>
    <iisnode loggingEnabled="false" debuggingEnabled="true" debuggerPathSegment="debug" />
    <rewrite>
      <rules>
        <clear />
        <rule name="Debug" patternSyntax="Wildcard" stopProcessing="true">
          <match url="app.js/debug*" />
          <conditions logicalGrouping="MatchAll" trackAllCaptures="false" />
          <action type="None" />
        </rule>
        <rule name="app" patternSyntax="Wildcard">
          <match url="*" negate="false" />
          <conditions logicalGrouping="MatchAll" trackAllCaptures="false" />
          <action type="Rewrite" url="app.js" />
        </rule>
      </rules>
    </rewrite>
  </system.webServer>
</configuration>