fix build script

Author: Blari

package.json

@@ -4,7 +4,7 @@
   "scripts": {
     "ng": "ng",
     "start": "ng serve",
-    "build": "ng build",
+    "build": "ng build --prod",
     "lint": "ng lint",
     "hmr": "ng serve --configuration hmr"
   },