Add getJsonDirectory helper

helpers/get-json-directory.js

@@ -0,0 +1,23 @@
+import fs from 'fs-extra'
+
+
+
+const directoriesToTry = [
+    './static/',
+
+    // Vercel Serverless Function
+    './.next/server/chunks/static'
+]
+
+export async function getJsonDirectory () {
+
+    for ( const directory of directoriesToTry ) {
+        const directoryExists = await fs.pathExists( directory )
+
+        if ( directoryExists ) {
+            return directory
+        }
+    }
+
+    throw new Error( 'Could not find json directory' )
+}