How to host an asp.net mvc app on a domain that points to a subfolder?

<rewrite>
        <rewriteMaps>
            <rewriteMap name="otherdomain" />
        </rewriteMaps>
        <rules>
            <rule name="otherdomain" stopProcessing="false">
                <match url=".*" />
                <conditions>
                    <add input="{HTTP_HOST}" pattern="otherdomain.com" />
                </conditions>
                <action type="Rewrite" url="/site_folder/otherdomain/{R:0}" />
            </rule>
        </rules>
    </rewrite>