Temporary Redirects Minus One URL

Site URL: http://www.aapiern.org/

We are looking to configure our domain, minus one url (/health), to temporarily redirect to an external domain. What is the best way to do this? URL mapping seems to redirect everything if I do:

Quote

/ -> https://www.externalsite.ext/ 302

Should I just use some javascript on each page minus the one we want to stay up?

If you want to redirect one page to external domain, add this to Page Header (Hover page on Main Navigation or Not Linked to open Page Header)

<script>
         setTimeout(function(){
            window.location.href = 'https://beaverhero.com';
         }, 1000);
</script>

Replace with external link url