First of all you will need node installed. You can get it from nodes official website and all the instructions are on the same page.

Once you have have node up and running you will need to install all dependencies. First of all in your terminal or commandline (if using windows run CMD as administrator) navigate to the directory which has package.json file. Once you are there just run:

npm install

If everything was fine and installed succesfully, in your shell navigate to ./bin/ directory of the project and run:

node www

Alternatively, you can go into the root of the glaWebDev folder and within the shell execute:

npm start

because the command npm start is configured within the package.json to run node www

After this step you should be able to see project being live in browser at http://localhost:3000