Hi Netlify just announced that they will forward traffic from
your-site.netlify.com address to
your-site.netlify.app starting from April 14.
Also they’ve said that:
What if I use a proxy in front of Netlify?
Since Netlify operates as a global CDN, we don’t encourage customers to use proxies or services like CloudFlare in front of Netlify. Using a non-Netlify proxy isn’t a configuration we officially support. (’) If you do need to use a third-party proxy, you will want to carefully test your application after the migration. Some proxies expect content returned and won’t be successful navigating the 301 redirect.