How to Upload file in a directory to minIO bucket

Hello everyone i have bucket in minio server and bucket name is 'geoxing' and geoxing have directory img/site. i want to upload picture in site directry using nodejs. below is code and i am getting error Invalid bucket name: geoxing/img/site. how can i solve this error. thanks

savefile() {
    const filePath = 'D://repositories//uploads//geoxing//site//b57e46b4bcf879839b7074782sitePic.jpg';
const bucketname = 'geoxing/img/site'
    var metaData = {
      'Content-Type': 'image/jpg',
      'Content-Language': 123,
      'X-Amz-Meta-Testing': 1234,
      example: 5678,
    };
    this.minioClient.fPutObject(
      bucketname,
      'b57e46b4bcf879839b7074782sitePic.jpg',
      filePath,
      metaData,
      function (err, objInfo) {
        if (err) {
          return console.log(err);
        }
        return console.log('Success', objInfo.etag);
      },
    );
  }