ci(sample): update build script

Author: kamilmysliwiec

sample/08-webpack/package.json

@@ -4,7 +4,8 @@
   "description": "Nest TypeScript starter repository",
   "license": "MIT",
   "scripts": {
-    "build": "nest build --watch --webpack",
+    "build": "nest build --webpack",
+    "build:dev": "nest build --watch --webpack",
     "start": "node dist/main"
   },
   "dependencies": {