Configure the dev-server with a webpack.config.js

Configure the dev-server with a webpack.config.js. 

Now you can add a `devServer` object to webpack.config.js with the following options.

````json
{
    devServer: {
        contentBase: "dist",
        colors: true,
        lazy: false,
        info: false,
        quiet: false,
    }
}
````

I found it annoying/difficult to remember the `content-base` path, so I wanted to set this in the config.js