There is a Debian/Ubuntu repository, that you can add by running:
echo "deb [signed-by=/usr/share/keyrings/flashmq-repo.gpg] http://repo.flashmq.org/debian stable main" > /etc/apt/sources.list.d/flashmq.list
You can download the repository GPG key here:
Its fingerprint is
874E6552A197BDD069A1526E1788BCA932A92BDF. It can be downloaded like:
curl https://www.flashmq.org/wp-content/uploads/2021/10/flashmq-repo.gpg > /usr/share/keyrings/flashmq-repo.gpg
(For now) there is also a zip download of the executable. It was compiled on Ubuntu 18.04 and should work any platform with new enough glibc (2.27), libstdc++ and openssl 1.1.0.