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

    # Gzip for the text assets.
    gzip on;
    gzip_types text/html text/css application/javascript application/json image/svg+xml;
    gzip_min_length 512;

    # Lightweight health endpoint for Coolify / Docker healthcheck.
    location = /healthz {
        access_log off;
        add_header Content-Type text/plain;
        return 200 "ok\n";
    }

    # Vendor libs can be cached hard.
    location /vendor/ {
        expires 30d;
        add_header Cache-Control "public, immutable";
    }

    # Never cache the app shell, so updates land immediately.
    location = /index.html {
        add_header Cache-Control "no-cache";
    }

    location / {
        try_files $uri $uri/ /index.html;
    }

    # Minimal hardening headers.
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header Referrer-Policy "no-referrer" always;
}