grunt clean提示錯誤

我在命令欄輸入grunt clean,提示以下錯誤

grunt-cli: The grunt command line interface (v1.2.0)

Fatal error: Unable to find local grunt.

If you're seeing this message, grunt hasn't been installed locally to
your project. For more information about installing and configuring grunt,
please see the Getting Started guide:

http://gruntjs.com/getting-started`

解決方法

sudo npm install -g grunt-cli

運行完以上命令繼續如下命令

cd [my project root]
npm install grunt --save-dev

運行grunt,出現如下錯誤

Loading "Gruntfile.js" tasks...ERROR
>> Error: Cannot find module 'node-minify'
Warning: Task "default" not found. Use --force to continue.

Aborted due to warnings.

從新運行

npm install –save-dev node-monify
npm install