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

    # Gzip text assets
    gzip              on;
    gzip_vary         on;
    gzip_min_length   1024;
    gzip_types        text/plain text/css application/javascript application/json image/svg+xml;

    # Hashed build assets are immutable -> cache aggressively
    location /assets/ {
        expires   1y;
        add_header Cache-Control "public, immutable";
        try_files $uri =404;
    }

    # SPA history fallback: unknown routes serve index.html
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Never cache the HTML entrypoint so new deploys are picked up immediately
    location = /index.html {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }
}