I am going to assume you already have Node.js + NPM install on your system. If you don't have it yet take a look at this guide.
Lets setup a project directory first.
mkdir portfolio
cd portfolio
Next we'll init a NPM module.
npm init
This will create an package.json which we'll use to save our dependencies.
npm install express, jade, jungles --save
Now that we have our dependencies and project directory lets create a base application next.