Added upload functionality to the encrypt function.

encryptUpload.js

async function encrypt(fileName, auth){
  const encryptParams = new Virtru.EncryptParamsBuilder()
    .withFileSource(`./encrypt-in/${fileName}`)
    .withDisplayFilename(fileName)
    .build();
  ct = await client.encrypt(encryptParams);
  var ctString = await ct.toString();

  const drive = google.drive({version: 'v3', auth});

  var fileMetadata = {
    'name': `${fileName}.tdf3.html`,
    parents: [folderId]
  };
  var media = {
    mimeType: 'text/html',
    body: ctString        // Body of file is created with the encrypted string output above. 
  };
  drive.files.create({
    resource: fileMetadata,
    media: media,
    fields: 'id'
  }, function (err, file) {
    if (err) {
      // Handle error
      console.error(err);
      console.log(`${fileName} - ERROR.`)
    } else {
      console.log(`- ${fileName}`);
    }
  });
}