安装 Node NPM

本快速入门是为 Mac OSX Mavericks 编写的，并且比其他安装说明更冗长。它应该有希望涵盖一些边缘情况，例如设置路径和配置 NPM，这可能导致安装出错。

    # install node
    # as of OSX Mavericks, we need the GUI installer (?!)
    # when a good command line alternative is found, we'll post it
    http://nodejs.org/download/
    
    # install npm
    curl -0 -L https://npmjs.org/install.sh | sh
    
    # check node is installed correctly
    node --version
    
    # check npm is installed correctly
    npm -version
    
    # find your npm path
    which npm
    
    # make sure npm is in your path
    sudo nano ~/.profile
      export PATH=$PATH:/usr/local/bin