For production systems, we strongly suggest that you always get the latest stable release from our web site, you can get the official tarballs (.tar.gz) from the following link:
https://fluentbit.io/download/
For people who aims to contribute to the project testing or extending the code base, can get the development version from our GIT repository:
Note that our master branch is where the development of Fluent Bit happens. Since it's a development version, expect issues when compiling or at run time.
We encourage everybody to help us testing every development version, at the end this is what will become stable.