docs: function checkIfMeteorIsRunning(pathToApp) {
    var pathToMongoLock = path.join(pathToApp, '.meteor', 'local', 'db', 'mongod.lock');
    return new Promise(function (resolve, reject) {
      fs.readFile(pathToMongoLock, { encoding: 'utf8' }, function (err, data) {
        if (err) {
          // if the file does not exist, then we are ok anyway
          return err.code !== 'ENOENT' ? reject(err) : resolve();
        } else {
          // isLocked iff the content is non empty
          resolve(!!data);
        }
      });
    });
  }