Question: How to debug webpack-dev-server

I am new to Universal rendering and i am using this repo as a reference for one of my project.
When I hit `http://localhost:3000` in the browser, nothing happens, it doesn't load js or any other asset. I am running `npm run dev`, so webpack-dev-server is running, but there is no way to check logs and hence I can't see what is happening when i hit the URL in the browser. My build is working fine and webpack-dev-server is also running properly without any errors on the console.
App port is 3000 and webpack-dev-server port is 3001 (defaults)
I have attached browser screenshot as well.
Can someone please tell me how to debug this ?