Azure front door redirect WWW to non WWW

Question

We have a live website that supports both www and non www. It redirects http -> https using front door, along with some other content related redirects. our analytics partner is asking for only Non WWW traffic for SEO, so we would like to redirect all WWW -> no www traffic.

I have attempted this with a web.config file but it did not work correctly, I'm wondering if we can accomplish this using a front door profile, or if there is another web.config approach to try.

Here is the web.config we attempted earlier.

<rule name="Remove WWW prefix" stopProcessing="true">
    <match url="(.*)" ignoreCase="true" />
    <conditions>
       <add input="{HTTP_HOST}" pattern="^www\.domainname\.net$" />
    </conditions>
    <action type="Redirect" url="https://domainname.net/{R:1}" redirectType="Permanent" />
</rule>