Handle internal server error using new custom template

handler/index/index.go

@@ -19,7 +19,7 @@ func GET(w http.ResponseWriter, r *http.Request) {
 	component := indexView.Main("main page", userSession)
 	err := component.Render(r.Context(), w)
 	if err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
+		w.WriteHeader(http.StatusInternalServerError)
 		log.Error(err.Error())
 		return
 	}