Read local file from jpg, pass to gotenberg libreoffice and then download result as pdf

test.js

const fs = require('fs/promises');
const { createWriteStream } = require("fs");
const util = require('util');
const stream = require('stream');
const got = require('got');  // third party
const FormData = require('form-data');  // third party

const pipeline = util.promisify(stream.pipeline);

const main = async () => {
    const data = await fs.readFile('./test.jpg', { encoding: null });

    let formData = new FormData();
    formData.append('file', data, {
        filename: 'test.jpg',
        contentType: 'image/jpg',
    });

    const downloadStream = got.stream.post(
        'https://demo.gotenberg.dev/forms/libreoffice/convert',
        {
            body: formData,
        }
    );

    const fileName = "hello.pdf"
    const fileWriterStream = createWriteStream(fileName);
    await pipeline(downloadStream, fileWriterStream)

    // Resave file example
    // const myData = await fs.readFile(fileName, { encoding: null });
    // fs.writeFile("./hello-2.pdf", myData)
}

main()