I want to save pdf into postgresql bytea field

My code is:

var data = {
template:{"shortid":"BkeiI9trWP"},
data: {"rows": genStatsJSON[0].jsonlistb },
options: { 'Content-Disposition': 'Attachment; filename=badges.pdf' }
}
var options = {
uri: 'http://localhost:3000/reporting/api/report',
method: "POST",
json: data
}

  const file = fs.createWriteStream('databaseReport.pdf');
  const response = await request(options).pipe(file);

const saveJob = await getManager().query(
INSERT INTO jobs_report (job_id, report_name, report_bytes) VALUES('d28d47ec-f5ee-41b9-a9a3-61796891e9e6','databaseReport.pdf', '${response}')
);

How can I save in node.js?

Firebase functions have read-only permission. There is no permission to create any file or edit any data. In this environment is possible to run jsreport?

My code is:

const express = require('express');
const app = express();

app.get('/', (req, res) => {
  res.send('Hello from the main application');
});

const reportingApp = express();
app.use('/reporting', reportingApp);

const server = app.listen(3000);

const jsreport = require('jsreport')({
  extensions: {
      express: { app: reportingApp, server: server },
  },
  appPath: "/reporting"
});

jsreport.init().then(() => {
  console.log('jsreport server started')
}).catch((e) => {
  console.error(e);
});