script 变更

package.json

@@ -68,7 +68,7 @@
   },
   "scripts": {
     "start": "PORT=5005 react-app-rewired start",
-    "server_install": "npm i --registry=https://registry.npmjs.org/",
+    "server_install": "yarn --registry=https://registry.npmjs.org/",
     "server_build": "./node_modules/react-scripts/bin/react-scripts.js build",
     "build": "react-scripts build",
     "test": "react-scripts test",