added npm install to netlify.toml and added node-fetch back in

netlify.toml

@@ -1,2 +1,3 @@
 [build]
   functions = "netlify/functions/"
+  command = "npm install"

netlify/functions/handleMetadata.js

@@ -1,6 +1,6 @@
 const https = require('https'); // Import for webscraping (fetchContentFromURL(url) function
 // const axios = require('axios');
-// const fetch = require('node-fetch').default;
+const fetch = require('node-fetch').default;
 // const fetch = request('node-fetch').default;
 
 // Placeholder function to fetch content from URL using a web scraping service