如何将pdfmake库生成的PDF文件上传到nodejs中的cloudinary？

  // Generate the PDF buffer using pdfmake
  const pdfBuffer = await new Promise((resolve, reject) => {
    const pdfmakes = new pdfmake(fonts);
    const doc = pdfmakes.createPdfKitDocument(documentDefinition, {});
    const chunks: any = [];
    doc.on('data', (chunk: any) => chunks.push(chunk));
    doc.on('end', () => resolve(Buffer.concat(chunks)));
    doc.end();
  });

  const tempFilePath = path.join(os.tmpdir(), 'temp.pdf');
  fs.writeFileSync(tempFilePath, pdfBuffer);

  const uploadResult = await cloudinary.v2.uploader.upload(tempFilePath, {
    folder: 'invoices',
    resource_type: 'auto',
  });

  console.log('upload result', uploadResult);