Added server build mode for webpack

ReallifeGamemode.Client/package.json

@@ -17,6 +17,7 @@
     "webpack-cli": "^3.2.3"
   },
   "scripts": {
-    "run": "webpack --watch"
+    "watch": "webpack --watch --config webpack.config.development.js",
+    "build:server": "webpack --config webpack.config.build.js"
   }
 }