chore: temporarily support Node.js v14 to deploy on Vercel

utils/blog.ts

@@ -1,5 +1,5 @@
-import fs from 'node:fs'
-import path from 'node:path'
+import fs from 'fs'
+import path from 'path'
 
 import type { MDXRemoteSerializeResult } from 'next-mdx-remote'
 import { nodeTypes } from '@mdx-js/mdx'