build 添加 环境变量 NODE_ENV=production

mobile-web/package.json

@@ -5,7 +5,7 @@
   "scripts": {
     "start": "npm run serve",
     "serve": "vue-cli-service serve",
-    "build": "vue-cli-service build",
+    "build": "vue-cli-service build NODE_ENV=production",
     "lint": "vue-cli-service lint"
   },
   "dependencies": {