在 前端文件夹下（renren-fast-vue），运行 npm run dev 报错
| 版本：renren-fast |
开发环境：无，在编译节点 |
ERROR Failed to compile with 6 errors 14:27:00
error in ./src/views/modules/sys/menu-add-or-update.vue
Module build failed: Error: Cannot find module 'node-sass'
at Function.Module._resolveFilename (module.js:536:15)
at Function.Module._load (module.js:466:25)
at Module.require (module.js:579:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (D:\work\git\renren\renren-fast-vue\node_modules\sass-
loader\lib\loader.js:3:14)
at Module._compile (module.js:635:30)
at Object.Module._extensions..js (module.js:646:10)
at Module.load (module.js:554:32)
at tryModuleLoad (module.js:497:12)
at Function.Module._load (module.js:489:3)
at Module.require (module.js:579:17)
at require (internal/module.js:11:18)
at loadLoader (D:\work\git\renren\renren-fast-vue\node_modules\loader-runner
