index.js

function postToJenkins(payload, jenkinsTargetUrl, token, basicAuth, XGithubDelivery) {
    let data = new FormData();

    data.append('payload', `${JSON.stringify(payload)}`);

    let config = {
      method: 'post',
      url: `${jenkinsTargetUrl}buildWithParameters?token=${token}`,
      headers: {
        'X-Github-Delivery': `${XGithubDelivery}`,
        'X-Github-Event': 'pull_request',
        'Authorization': `Basic ${basicAuth}`,
        ...data.getHeaders()
      },
      data : data
    };

    axios(config)
    .then(function (response) {
      console.log(JSON.stringify(response.data));
    })
    .catch(function (error) {
      console.log(error);
    });
}