Wordress client error

gistfile1.txt

> webpack-dev-server --port 8080 --json --progress

module.js:472
    throw err;
    ^

Error: Cannot find module 'webpack'
    at Function.Module._resolveFilename (module.js:470:15)
    at Function.Module._load (module.js:418:25)
    at Module.require (module.js:498:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/usr/local/lib/node_modules/webpack-dev-server/bin/webpack-dev-server.js:17:15)
    at Module._compile (module.js:571:32)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:488:32)
    at tryModuleLoad (module.js:447:12)
    at Function.Module._load (module.js:439:3)

npm ERR! Linux 4.4.0-53-generic
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "start"
npm ERR! node v7.2.1
npm ERR! npm  v4.0.5
npm ERR! code ELIFECYCLE
npm ERR! wordpress-hybrid-client@2.0.0-beta16 start: `webpack-dev-server --port 8080 --json --progress`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the wordpress-hybrid-client@2.0.0-beta16 start script 'webpack-dev-server --port 8080 --json --progress'.
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 wordpress-hybrid-client package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     webpack-dev-server --port 8080 --json --progress
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs wordpress-hybrid-client
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls wordpress-hybrid-client
npm ERR! There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?

npm ERR! Please include the following file with any support request:
npm ERR!     /home/yusadolat/wordpress-hybrid-client/npm-debug.log