forum-app/frontend/conf/nginx.conf

events {
    worker_connections  1024;
}

http {
    server {
        listen 8000 default_server;
        listen [::]:8000 default_server;

        root /app;
        index index.html;
        server_name _;

        location / {
            try_files $uri $uri/ =404;
        }

        location /api {
            proxy_pass http://backend:8000/;
        }
    }
}