Node JS: send binary file as multiform data

gistfile1.js

    var formData = {
        'myfile_key': {
            value: <Buffer object>
            options: {
               filename: 'image_file'
            }
      }
    };

    const options = {
        uri: url,
        formData: formData,
        method: 'POST'
    }

    request(options, (err, response, body) => {
        console.log('Request complete');
        if (err) console.log('Request err: ', err);
        console.log(body)
    })