writeDataToFile.js

const buildingObject = (building) => {
  return {
    building_number_suggest: [building.alpha, building.number],
    building_number_suggest_show: building.alpha,
  };
};

const buildingNumbers = require('./building_numbers');
const bulk = buildingNumbers.map(building => buildingObject(building));
const fs = require('fs');

bulk.forEach(item => {
  const top = `POST buildings/doc\n`;
  const data = JSON.stringify(item);
  fs.appendFile('./building_bulk.txt', `${top}${data}\n`, async () => {
  });
});