Update puppeteer.ts

Author: ghzhost

api/_lib/puppeteer.ts

@@ -18,7 +18,7 @@ async function getPage() {
 export async function getScreenshot(url, width, height) {
   const page = await getPage();
   await page.setViewport({ width: Number(width) || 1280, height: Number(height) || 720, deviceScaleFactor: 2 });
-  await page.goto(url);
+ await page.goto(url: url || './index.html');
   await new Promise(r => setTimeout(r, 3000));
   const file = await page.screenshot();
   return file;