code: function svgs(req, res) {
    const bundle = new Bundle(
      req.url.slice(1, -5).split('-').map(function map(name) {
        return assets[name];
      })
    );
  
    bundle.run(function (err, output) {
      if (err) throw err;
  
      res.setHeader('Content-Length', Buffer(output).length);
      res.writeHead(200, { 'Content-Type': 'text/plain' });
  
      res.end(output);
    });
  }
docs: Serve the bundle.svgs.
  
  @param {Request} req HTTP request.
  @param {Response} res HTTP response.
  @private