docs(tutorial/Tutorial): add to PATH in Windows

docs/content/tutorial/index.ngdoc

@@ -105,6 +105,9 @@ Check the version of Node.js that you have installed by running the following co
 node --version
 ```
 
+If this did not work, and you are using Windows, make sure to add the directory in which you 
+installed Node.js in the PATH system environment variable.
+
 In Debian based distributions, there is a name clash with another utility called `node`. The
 suggested solution is to also install the `nodejs-legacy` apt package, which renames `node` to
 `nodejs`.