server {
    listen 80;
    listen [::]:80;
    server_name _;

    root /usr/share/nginx/html;
    index index.html;
    charset utf-8;

    gzip_static on;

    error_page 404 /404.html;

    # hashed build assets: cache forever
    location /_astro/ {
        include /etc/nginx/snippets/security-headers.conf;
        add_header Cache-Control "public, max-age=31536000, immutable" always;
        try_files $uri =404;
    }

    # everything else (HTML, sitemap, offline artifact): revalidate
    location / {
        include /etc/nginx/snippets/security-headers.conf;
        add_header Cache-Control "no-cache" always;
        try_files $uri $uri/ =404;
    }
}