LFFE-14 Create test for first page

src/pages/_app.jsx

@@ -15,7 +15,7 @@ const App = ({Component, pageProps}) => {
         <>
             <UserProvider>
                 <LanguageProvider>
-                    <NextIntlProvider messages={pageProps.messages || {}}>
+                    <NextIntlProvider locale={pageProps.locale} messages={pageProps.messages || {}}>
                         <MuiLayout isBot={pageProps.isBot}>
                             {pageProps.messages ? <TitlePage text={pageProps.title}/> : ''}
                             <LoadingProvider>

src/pages/index.jsx

@@ -16,6 +16,7 @@ export async function getServerSideProps({req, locale}) {
             messages: (await import(`&/locales/${locale}/app.json`)).default,
             title: "first_page",
             isBot,
+            locale
         },
     };
 }