export.handler = function (evt, ctx, callback) {
  Promise.resolve()
    .then(() => {
      const koaRequest = convertToKoaRequest()
      return myAppResponseHandler(koaRequest);
    })
    .then(koaResponse => {
      callback(null, {
        statusCode: koaResponse.statusCode
        headers: getHeaders(koaResponse)
        body: getBody(koaResponse)
      });
    })
    .catch(e => {
      callback(e);
    });
  };
};