CORS error when deployed to fly.io and using custom domain
I've deployed my Opensaas ap to fly.io (https://zigozi-server.fly.dev and -client.fly.dev), and configured https://zigozi.com(registered at a different hosting company) to resolve to it (to the fly.io) but when I visit zigozi.com, I get the error "Access to XMLHttpRequest at 'https://zigozi-server.fly.dev/auth/me' from origin 'https://zigozi.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.". How do I address this?