我使用本教程“ https://youtu.be/DqtKuXFfhsQ”创建了Angular + Nodejs项目。当我想通过“ ng serve”在Visual Studio Code 2017中调试项目时，Studio Code对我说：
D:/ ... "SOME PATH"> ng serve
ng : The term 'ng' is not recognized as the name of a cmdlet, function, script file, or operable p
rogram. Check the spelling of the name, or if a path was included, verify that the path is correct
and try again.
At line:1 char:1
+ ng serve
+ ~~
+ CategoryInfo : ObjectNotFound: (ng:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
在PowerSheel中可以使用ng serve --open，但在Visual Studio中无法使用Code。我该怎么做才能解决我的问题？谢谢