server.js

import express from "express";
import puppeteer from "puppeteer";

const app = express();
app.use(express.json({ limit: "10mb" }));

const PORT = process.env.PORT || 7860; // IMPORTANT

app.post("/pdf", async (req, res) => {
  try {
    const { html, options = {} } = req.body;

    if (!html) {
      return res.status(400).json({ error: "Missing HTML" });
    }

    const browser = await puppeteer.launch({
      executablePath: process.env.PUPPETEER_EXECUTABLE_PATH,
      args: [
        "--no-sandbox",
        "--disable-dev-shm-usage",
        "--disable-setuid-sandbox",
        "--disable-gpu",
        "--no-zygote"
      ],
    });

    const page = await browser.newPage();
    await page.setContent(html, { waitUntil: "networkidle0" });

    const pdf = await page.pdf({
      format: "A4",
      printBackground: true,
      ...options
    });

    await browser.close();

    res.setHeader("Content-Type", "application/pdf");
    res.send(pdf);
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: err.message });
  }
});

/* Optional but recommended root route */
app.get("/", (_req, res) => {
  res.send("Puppeteer PDF Service is running");
});

app.listen(PORT, () => {
  console.log(`Puppeteer PDF service running on port ${PORT}`);
});