server {
    listen 80;
    root /usr/share/nginx/html;
    index index.html;

    # Gzip compression
    gzip on;
    gzip_types text/html text/css application/javascript application/json;
    gzip_min_length 256;

    # Hashed assets — cache forever
    location /assets/ {
        add_header Cache-Control "public, max-age=31536000, immutable";
    }

    # SPA fallback — no-cache on index.html
    location / {
        add_header Cache-Control "no-cache";
        try_files $uri $uri/ /index.html;
    }
}