Resolved body-parser deprecation messages

Hey,

I love the simplicity of this repo. I use it quite a bit for a .sh script I run. There are body-parser errors as of Express 4. They are extremely easy to fix, thankfully.

```bash
body-parser deprecated bodyParser: use individual json/urlencoded middlewares server.js:13:9
body-parser deprecated urlencoded: explicitly specify "extended: true" for extended parsing node_modules/body-parser/index.js:74:29
```

I updated the server.js file to use the new version. I also added a .gitignore file to ignore the node modules in case someone else wants to fork this repo.