project.clj

(defproject foo "0.1.0-SNAPSHOT"
  :dependencies [[org.clojure/tools.nrepl    "0.2.12"]
                 [cider/cider-nrepl          "0.14.0"]]
  :profiles {:uberjar {:main foo.repl
                       :aot  [foo.repl]}})

repl.clj

(ns foo.repl
  (:require [clojure.tools.nrepl.server :as nrepl-server]
            [cider.nrepl :refer [cider-nrepl-handler]]))

(defn start-repl
  []
  (println "Starting a REPL server...")
  (nrepl-server/start-server :bind "0.0.0.0"
                             :port 7888
                             :handler cider-nrepl-handler))

(defn -main [& args]
  (start-repl))