server {
    listen 8080;
    root /usr/share/nginx/html;
    index index.html;

    location / {
        try_files $uri $uri/ /index.html;
    }

    # Both containers share host network; api is on localhost:3001.
    # Trailing slash strips the /api/ prefix before forwarding.
    location /api/ {
        proxy_pass         http://127.0.0.1:3001/;
        proxy_set_header   Host              $host;
        proxy_set_header   X-Real-IP         $remote_addr;
        proxy_set_header   X-Forwarded-For   $proxy_add_x_forwarded_for;
    }
}