Call the Docker API using http.request wrapped in a promise

docker-info-api.js

#!/usr/bin/env node

import { request } from 'http';

function callDockerAPI(path) {
  return new Promise ((resolve, reject) => {
  let options = {
    socketPath: '/var/run/docker.sock',
    method: 'GET',
    path: path
  };

  const req = request(options, (res) => {
    let data = '';

    res.on('data', d => {
      data += d.toString();
    });
    res.on('end', () => {
      console.info(`${res.statusCode} API ${options.method} ${options.path}`);
      resolve(data);
    });
  });
  req.on('error', err => {
    reject(err);
  });
  req.end();
  });
}

let info = await callDockerAPI('/info');
console.log(info);