新增一个命令

designer/package.json

@@ -14,6 +14,7 @@
   "repository": "",
   "main": "dist/FormMaking.common.js",
   "scripts": {
+    "dev": "vue-cli-service serve --open",
     "serve": "vue-cli-service serve --open",
     "build": "vue-cli-service build",
     "lint": "vue-cli-service lint",