You can download a release from Github.
In order to build Meuse, you need to install Leiningen. You should also set the environment variable LEIN_SNAPSHOTS_IN_RELEASE to true.
Then, clone the Meuse repository and execute lein uberjar. The resulting jar will be target/uberjar/meuse-<version>-standalone.jar.
The Dockerfile file at the root of the Meuse repository will build Meuse using leiningen, an then build an image which will contain the jar and launch the project.