See How to Contribute for general instructions on contributing to any Fluo project.
If you have Git, Maven, and Java (version 8+) installed, run these commands to build Fluo Bytes:
git clone https://github.com/apache/fluo-bytes.git
cd fluo-bytes
mvn package
Before making a pull request please attempt to run mvn verify
. If it fails and you are not sure
why, it's OK to go ahead make the pull request with a comment about the failure.