Update to move server logic to the server module.

src/main/blog/core.cljs

@@ -1,16 +1,7 @@
 (ns blog.core
-  (:require ["express" :as express]
+  (:require [blog.server :as server]))
-            [blog.env :as env]))
 
-(def app (express))
-(def port (env/get-port))
 
 (defn main []
-  (. app get "/"
+  (server/start))
-     (fn [req res]
-       (. res send "Hello world")))
-
-  (. app listen port
-     (fn []
-       (println "Listen on " port))))
 

src/main/blog/server.cljs

@@ -0,0 +1,23 @@
+(ns blog.server
+  (:require ["express" :as express]
+            [blog.env :as env]))
+
+(def app (express))
+(def port (env/get-port))
+
+(defn set-routes
+  "Sets the routes for server."
+  []
+  (. app get "/"
+     (fn [req res]
+       (. res send "Hello world"))))
+
+(defn start
+  "Starts server."
+  []
+  (set-routes)
+
+  (. app listen port
+     (fn []
+       (println "Listen on " port))))
+