新增npm指令

package.json

@@ -3,6 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "scripts": {
+	"start": "npm run server",
     "server": "vue-cli-service serve && webpack-dev-server --open",
     "dev": "vue-cli-service build --mode development",
     "test": "vue-cli-service build --mode test",