Redirect index.mdx to parent directory

website/pages/[...listPathPage].tsx

@@ -39,7 +39,10 @@ export const getStaticPaths: GetStaticPaths<ParsedUrlQuery> = async () => {
 
                 return {
                     params: {
-                        listPathPage: [...pathBase, dirent.name.replace('.mdx', '')],
+                        listPathPage:
+                            dirent.name === 'index.mdx'
+                                ? pathBase
+                                : [...pathBase, dirent.name.replace('.mdx', '')],
                     },
                 }
             })
@@ -50,20 +53,25 @@ export const getStaticPaths: GetStaticPaths<ParsedUrlQuery> = async () => {
     }
 }
 
+const getPathFileWithExtension = (listPathFile: ReadonlyArray<string>) =>
+    `${path.join(...listPathFile)}.mdx`
+
 export const getStaticProps: GetStaticProps<PropsPage, ParsedUrlQuery> = async (args) => {
     if (!args.params) {
         return { notFound: true }
     }
 
-    const mdx = await serialize(
+    const listPathFile = ['docs', ...args.params.listPathPage]
-        fs.readFileSync(`${path.join('docs', ...args.params.listPathPage)}.mdx`, 'utf-8'),
+    const isIndex = fs.existsSync(getPathFileWithExtension(listPathFile)) !== true
-        {
+    const listPathFileWithIndex = isIndex ? [...listPathFile, 'index'] : listPathFile
+    const listPathFileWithIndexAndExtension = getPathFileWithExtension(listPathFileWithIndex)
+
+    const mdx = await serialize(fs.readFileSync(listPathFileWithIndexAndExtension, 'utf-8'), {
         parseFrontmatter: true,
         mdxOptions: {
             remarkPlugins,
         },
-        }
+    })
-    )
 
     return {
         props: {