dev server hangs after first run

Hi all! I have an issue with react-redux-universal-hot-example.

At first run i get dev server up and running i navigated to http://localhost:3000/ but got a #965 error. I stop dev server by control+c and remove webpack-assets.json as adviced.

But AFTER that when i type `npm run dev` i see this in console:

```
> react-redux-universal-hot-example@0.9.0 dev
> concurrent --kill-others "npm run watch-client" "npm run start-dev" "npm run start-dev-api"

[0]
[0] > react-redux-universal-hot-example@0.9.0 watch-client
[0] > better-npm-run watch-client
[0]
[2]
[2] > react-redux-universal-hot-example@0.9.0 start-dev-api
[2] > better-npm-run start-dev-api
[2]
[1]
[1] > react-redux-universal-hot-example@0.9.0 start-dev
[1] > better-npm-run start-dev
[1]
[0] running better-npm-run in
[2] running better-npm-run in
[1] running better-npm-run in
[0] Executing script: watch-client
[0]
[1] Executing script: start-dev
[1]
[2] Executing script: start-dev-api
[2]
[0] to be executed: node webpack/webpack-dev-server.js
[2] to be executed: node ./bin/api.js
[1] to be executed: node ./bin/server.js
[0] ==> 🚧 Webpack development server listening on port 3001
```

But when i navigate to http://localhost:3001/ i don't see any results because of infinite page loading.