nginx.conf

events {}

http {
    server {
        listen 80;

        location / {
            proxy_pass http://wordpress:8080;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;

            add_header 'Access-Control-Allow-Origin' 'http://localhost:4321' always;
            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
            add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type, Accept' always;

            if ($request_method = 'OPTIONS') {
                add_header 'Content-Length' 0;
                add_header 'Content-Type' 'text/plain; charset=utf-8';
                return 204;
            }
        }
    }
}