By adding simple HEAD/GET request to the engine it would be possible to detect the used backend technologie.
whatweb 10.10.11.220
http://10.10.11.220 [200 OK] Cookies[XSRF-TOKEN,intentions_session], Country[RESERVED][ZZ], HTML5, HTTPServer[Ubuntu Linux][nginx/1.18.0 (Ubuntu)], HttpOnly[intentions_session], IP[10.10.11.220], Script, Title[Intentions], UncommonHeaders[x-content-type-options], X-Frame-Options[SAMEORIGIN], X-XSS-Protection[1; mode=block], nginx[1.18.0]
By adding simple HEAD/GET request to the engine it would be possible to detect the used backend technologie.