I have been able to get this to work by installing an Apache HTTP Web Server, running it on port 8080 and using the steps here to redirect all requests to my WebView HTTPS Jetty Web server running on mywebviewserver under port 8443:
Redirect fom Apache HTTP server to Jetty · CodeRevisited
My httpd-vhosts.conf file contains:
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<VirtualHost *:8080>
DocumentRoot "C:/Apache24/htdocs"
ErrorLog logs/webview_redirect_error.log
CustomLog logs/webview_redirect_access.log combined
LogLevel error
<Directory "C:/Apache24/htdocs">
Options MultiViews FollowSymLinks
AllowOverride all
Require all granted
</Directory>
RewriteEngine On
RewriteRule "^/(.*)" "https://mywebviewserver:8443/"
</VirtualHost>
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Full Apache httpd.conf & httpd-vhosts.conf files attached