Outdated

This tutorial looks awfully outdated. Just `npm install` throws 
```
found 34 vulnerabilities (2 low, 23 moderate, 9 high)
```
and starting is not possible either with quite current npm:
```
$ npm --version
6.14.8
$ npm start

> PatternFlyDemo@1.0.0 start /var/www/html/patternfly-tutorial
> gulp

fs.js:35
} = primordials;
    ^

ReferenceError: primordials is not defined
```