nginx.conf

server {
    listen 3000;
    server_name _;

    root /usr/share/nginx/html;
    index index.html;

    # Serve static files directly
    location / {
        try_files $uri $uri/ /index.html;
        # This fallback to index.html is critical to support React Router
    }

    # Optional: cache static assets for performance
    location ~* \.(js|css|png|jpg|jpeg|gif|svg|ico|woff|woff2|ttf|eot|otf|json)$ {
        expires 1M;
        access_log off;
        add_header Cache-Control "public";
    }

    # Optional: disable .htaccess and hidden files access
    location ~ /\. {
        deny all;
    }

    error_page 404 /index.html;

    # Log files location (can customize)
    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;
}