How to start/stop Jetty Ring server with REPL

handler.clj

(ns .handler
  (:require [compojure.api.sweet :refer [GET defapi context]]
            [ring.util.http-response :refer [ok]]
            [compojure.api.swagger :refer [swagger-routes]]))

(defapi app
  (swagger-routes)
  (GET "/events" []
       :query-params [name :- String]
       (ok {:message (str "Hello, " name)})))
     

main.clj

(ns yogurt.main
  (:require [yogurt.server :as server]
            [yogurt.handler :refer [app]]))

(defn stop-server []
  (server/stop))

(defn start-server []
  (stop-server)
  (server/start app))

(defn -main []              ; For running in command line with `lein run`
  (start-server))

server.clj

(ns yogurt.server
  (:require [ring.adapter.jetty :as jetty]    ; Requires ring-jetty-adapter as dependency https://github.com/ring-clojure/ring/tree/master/ring-jetty-adapter
            [clojure.tools.logging :as log]))

(def _server (atom nil))

(defn start
  ([app] (start app {}))
  ([app options]
   (let [{:keys [port] :or {port 3000}} options
         server (jetty/run-jetty app {:port port :join? false})] ; Options are described here https://github.com/ring-clojure/ring/blob/4a3584570ad9e7b17f6b1c8a2a17934c1682f77d/ring-jetty-adapter/src/ring/adapter/jetty.clj#L104-L129
     (reset! _server server)
     (log/info "Starting server at port" port)
     server)))

(defn stop []
  (.stop @_server)
  (reset! _server nil))