React set up error while running npm start :Configuration file found but no entry configured. Use --help to display the CLI options - reactjs

Question

I am getting error while setting environment for my react app.
I have not done any thing as per coding prospective .
Its just a hello world programme in react.
I have also uploaded my node modules in the below given url .
I have put down my code in Github : https://github.com/Arpan1089/reactapp
error :
reactapp#1.0.0 start C:\Users\Sumeet\Desktop\reactapp
webpack-dev-server
Configuration file found but no entry configured.
Use --help to display the CLI options.
npm ERR! Windows_NT 6.1.7601
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\
node_modules\\npm\\bin\\npm-cli.js" "start"
npm ERR! node v6.11.0
npm ERR! npm v3.10.10
npm ERR! code ELIFECYCLE
npm ERR! reactapp#1.0.0 start: `webpack-dev-server`
npm ERR! Exit status 4294967295
npm ERR!
npm ERR! Failed at the reactapp#1.0.0 start script 'webpack-dev-server'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the reactapp package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! webpack-dev-server
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs reactapp
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls reactapp
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! C:\Users\Sumeet\Desktop\reactapp\npm-debug.log

Answer 1

Add this in your package.json inside scripts tag
"scripts": {
"start": "webpack-dev-server --hot"
},
and install webpack-dev-server --hot and webpack-dev-server using
npm install webpack-dev-server
And may be you have another process running on the same port (8080) on localhost which will prevent your app to run.