code: function _checkRootCA () {
    var caKeyFilePath = path.join(certDir, 'ca.key');
    var caCrtFilePath = path.join(certDir, 'ca.crt');
  
    var keysDir = path.join(__dirname, '..', 'keys');
  
    if (!fs.existsSync(caKeyFilePath) || !fs.existsSync(caCrtFilePath)) {
      log.debug('CA files do not exist');
      log.debug('Copy CA files');
      fse.copySync(path.join(keysDir, 'ca.key'), caKeyFilePath);
      fse.copySync(path.join(keysDir, 'ca.crt'), caCrtFilePath);
    }
  }
docs: Check the ca files
  
  Copy them if they does not exist