code: function startServer() {
      http.createServer((req, res) => {
          const fileName = __dirname + path.sep + new Date().getTime() + '.png';
  
          req.on('end', () => {
              res.writeHead(200);
              res.end();
  
              fs.stat(fileName, function(error, stat) {
                console.log(
                  'Stored file ' + fileName +
                  ' with size ' + stat.size +
                  ', headers: ' + JSON.stringify(req.headers)
                );
                fs.unlinkSync(fileName);
              });
          });
          req.pipe(fs.createWriteStream(fileName));
      }).listen(DEF_CLIENT_PORT);
  
      console.log("Client server running on port 8124");
  }
docs: Start client HTTP server.