🐛 Fix slug page and refactor server side translations code

src/tools/getServerSideTranslations.ts

@@ -0,0 +1,19 @@
+import { getCookie } from 'cookies-next';
+import { IncomingMessage, ServerResponse } from 'http';
+import { serverSideTranslations } from 'next-i18next/serverSideTranslations';
+
+export const getServerSideTranslations = async (
+  req: IncomingMessage,
+  res: ServerResponse,
+  namespaces: string[],
+  requestLocale?: string
+) => {
+  const configLocale = getCookie('config-locale', { req, res });
+
+  const translations = await serverSideTranslations(
+    (configLocale ?? requestLocale ?? 'en') as string,
+    namespaces
+  );
+
+  return translations;
+};