First you need to install Node.js, if you haven't already:
https://nodejs.org/en/download/
The Node Package Manager ( npm ) comes with Node.js, but this is not necessarily the latest version ( npm gets updated more regularly than Node.js ). It is better to upgrade npm to the latest version. For this open a console ( command prompt ) window and type:
npm install npm@latest -g
Now you are ready for installing nodeserv. At the same console window type:
npm install -g nodeserv
Open a console window and type:
nodeserv
Then navigate your browser to:
localhost:9000