Update server.js

server.js

@@ -32,7 +32,7 @@ app.post("/v1/start", async (req, res) => {
     await page.goto('https://example.com');
     await page.setContent(html, { waitUntil: "load" });
     const output = `${tmp}/${utils.randomName('.jpg')}`
-    const buffer = await page.screenshot({ path: output });
+    await page.screenshot({ path: output });
 
     await browser.close();