build utils

frontend/app/src/config/translationMap.json

@@ -64,5 +64,8 @@
     },
     "Dashboard": {
         "ru": "Панель управления"
+    },
+    "Page not found": {
+        "ru": "Страница не найдена"
     }
 }

frontend/app/src/pages/NotFoundPage.tsx

@@ -9,7 +9,8 @@ const NotFoundPage = () => {
       <div style={{ width: "100%", marginTop: "3rem" }}>
         <QuestionCircleOutlined style={{ fontSize: "5rem" }} />
       </div>
-      <Title>{tr("Not found")}</Title>
+      <Title>{tr("Page not found")}</Title>
+      <Title level={3}>404</Title>
     </>
   );
 };