server {
    listen 80;
    server_name _;

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

    gzip on;
    gzip_types text/plain text/css application/javascript application/json image/svg+xml;

    # Static assets with long cache
    location ~* \.(js|css|png|jpg|jpeg|gif|svg|webp|ico|woff2?)$ {
        expires 30d;
        add_header Cache-Control "public, immutable";
        try_files $uri =404;
    }

    # SPA fallback: serve index.html for any unknown route
    location / {
        try_files $uri $uri/ /index.html;
    }
}