Add listing vercel function

api/listings/listing.js

@@ -0,0 +1,42 @@
+import { getJsonDirectory } from '@/helpers/get-json-directory.js'
+
+let jsonDirectory
+
+class Listing {
+
+    constructor() {
+        // // The doc that contains the sheet
+        // this.doc = null
+
+        // // The sheet for out data
+        // this.sheet = null
+
+        // // The sheet for out data
+        // this.rows = null
+    }
+
+
+
+    async handler (req, res) {
+        // const requestUrl = new URL(req.url, 'https://localhost:3000')
+
+        jsonDirectory = await getJsonDirectory()
+        // console.log('resultInfo', resultInfo)
+
+        // Set JSON Header
+        res.setHeader('Content-Type', 'application/json')
+
+        // Repond with JSON Data
+        res.json( {
+            jsonDirectory
+        } )
+    }
+
+}
+
+
+export default async function (req, res) {
+    const lister = new Listing()
+
+    return await lister.handler(req, res)
+}