Failed at the angular2-seed@1.0.0 start script

[harishmahajan]

i followed your instruction. but still i am facing this error.

js20@js20:~/Desktop/angular2-seed$ npm start

angular2-seed@1.0.0 start /home/js20/Desktop/angular2-seed npm run server

angular2-seed@1.0.0 server /home/js20/Desktop/angular2-seed webpack-dev-server --inline --progress --port 3000 --content-base src

sh: 1: webpack-dev-server: not found npm ERR! file sh npm ERR! code ELIFECYCLE npm ERR! errno ENOENT npm ERR! syscall spawn npm ERR! angular2-seed@1.0.0 server: webpack-dev-server --inline --progress --port 3000 --content-base src npm ERR! spawn ENOENT npm ERR! npm ERR! Failed at the angular2-seed@1.0.0 server script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in: npm ERR! /home/js20/.npm/_logs/2017-09-29T04_08_16_556Z-debug.log npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! angular2-seed@1.0.0 start: npm run server npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the angular2-seed@1.0.0 start script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in: npm ERR! /home/js20/.npm/_logs/2017-09-29T04_08_16_629Z-debug.log

my node version node = v8.4.0

my npm version npm = 5.4.2