This merge request updates `fastify` package from v1 to v2 and adds the `cross-env` package so `NODE_ENV=` can work on Windows as well as OSX/Linux. Also adds example build output to GITIGNORE
Worth mentioning that pressing `a` will bring up a page that says `b` and vice-versa, but this seems to be the logic from the previous example as well. Can change if wanted
I wrote a [script](https://github.com/j0lv3r4/dependency-version-updater) to update dependencies recursively in `package.json` files, e.g.:
```
$ node index.js --path="./examples" --dependencies="react=^16.7.0,react-dom=^16.7.0"
```
This PR contains the result against the examples folder.
