The server listens on port 3000 for TCP connections and serves:

* `GET /` - returns a static `index.html` asset
* `GET /stylesheets/*` - returns static assets found in the
  `static/stylesheets` directory
* `GET /hello` - an example handler function that returns a string

Resources:

* https://codegangsta.gitbooks.io/building-web-apps-with-go/content/testing/unit_testing/index.html
* https://codegangsta.gitbooks.io/building-web-apps-with-go/content/testing/end_to_end/index.html
* https://codegangsta.gitbooks.io/building-web-apps-with-go/content/url_routing/index.html
* https://github.com/julienschmidt/httprouter
* https://golang.org/pkg/net/http/httptest/

See julienschmidt/httprouter#177 (comment)

I wanted to log the response status too, but it seems like there
isn't a straightforward way to do that, see
https://github.com/felixge/httpsnoop#why-this-package-exists and
https://github.com/urfave/negroni/blob/master/logger.go.