Fix TURNSTILE_ACTIVE boolean evaluation

Author: Kf637

server.js

@@ -50,7 +50,7 @@ const TURNSTILE_SITE_KEY = process.env.TURNSTILE_SITE_KEY || '';
 const TURNSTILE_SECRET_KEY = process.env.TURNSTILE_SECRET_KEY || '';
 const TURNSTILE_COOKIE_NAME = process.env.TURNSTILE_COOKIE_NAME || 'cf_turnstile_token';
 const TURNSTILE_COOKIE_TTL_SECONDS = 6 * 60 * 60; // 6 hours
-const TURNSTILE_ACTIVE = TURNSTILE_ENABLED && TURNSTILE_SITE_KEY && TURNSTILE_SECRET_KEY;
+const TURNSTILE_ACTIVE = !!(TURNSTILE_ENABLED && TURNSTILE_SITE_KEY && TURNSTILE_SECRET_KEY);
 const ROOT = path.resolve(__dirname);
 const DEBUG_HTTP = !!process.env.DEBUG_HTTP;
 const API_TIMEOUT_MS = 15000; // hardcoded 15s timeout for external API calls