Download the example or clone the whole project:
curl https://codeload.github.com/jaredpalmer/razzle/tar.gz/master | tar -xz --strip=2 razzle-master/examples/with-react-router-3
cd with-react-router-3
Install it and run:
yarn install
yarn start
This is a basic, bare-bones example of how to use Razzle and React Router 3.