Update index.ts

Author: RemiixInc

api/index.ts

@@ -1,8 +1,8 @@
 import { NowRequest, NowResponse } from '@vercel/node'
-import { getScreenshot } from './_lib/chromium';
+import { getScreenshot } from './_lib/puppeteer';
 
 module.exports = async (req: NowRequest, res: NowResponse) => {
-  const usage = "https://screenshot.totallyusefulapi.ml/api?url=https://google.com&width=1366&height=625"
+  const usage = `${req.protocol}://${req.hostname}/api?url=https://google.com&width=1366&height=625`
   if (!req.query.url) return res.json({
     "success": false,
     "error": "No url query specified!",