You'll need java (at least version 1.7).
This Clojure project uses boot. Install it following the directions in that README.
To build the server:
which java # ensure you have java installed
which boot # ensure you have boot installed
boot -u # keep boot up-to-date
export BOOT_JVM_OPTIONS=-Dclojure.compiler.direct-linking=true # enable direct linking
boot build # builds an uberjar to the build/ directory
Then, to run the server:
java -server -XX:+AggressiveOpts -XX:+UseG1GC -XX:MaxGCPauseMillis=50 -Xms8g -Xmx8g -jar build/app.jar # defaults to port 3000
OR
java -jar build/app.jar 4000
If you like REPLs:
boot repl