docs: function _relativeCopy(fileGlob, from, to) {
    return new Promise((resolve, reject) => {
      glob(
        fileGlob,
        {
          cwd: from,
          nodir: true,
        },
        (err, files) => {
          if (err) reject(err);
          files.forEach(file => {
            const origin = path.join(from, file);
            const dest = path.join(to, file);
            const data = fs.readFileSync(origin, 'utf-8');
            _recursiveMkDir(path.dirname(dest));
            fs.writeFileSync(dest, data);
            resolve();
          });
        },
      );
    });
  }