added proper configuration using aero

project.clj

@@ -6,6 +6,7 @@
   :dependencies [[org.clojure/clojure "1.9.0"]
                  [org.clojure/core.async "0.4.474"]
                  ;; web
+                 [aero "1.1.3"]
                  [http-kit "2.3.0"]
                  [compojure "1.6.1"]
                  [javax.servlet/javax.servlet-api "3.1.0"]