运行npm run build 报错，已装了webpack-cli

E:\webpack-vue>npm run build

> webpack-vue@1.0.0 build E:\webpack-vue

> webpack --config webpack.config.js

E:\webpack-vue\node_modules\webpack-cli\bin\cli.js:244

                                throw err;

                                ^

Error: Cannot find module 'E:\webpack-vue\webpack.config.js'

    at Function.Module._resolveFilename (module.js:547:15)

    at Function.Module._load (module.js:474:25)

    at Module.require (module.js:596:17)

    at require (E:\webpack-vue\node_modules\v8-compile-cache\v8-compile-cache.js:159:20)

    at WEBPACK_OPTIONS (E:\webpack-vue\node_modules\webpack-cli\bin\convert-argv.js:133:13)

    at requireConfig (E:\webpack-vue\node_modules\webpack-cli\bin\convert-argv.js:135:6)

    at E:\webpack-vue\node_modules\webpack-cli\bin\convert-argv.js:142:17

    at Array.forEach (<anonymous>)

    at module.exports (E:\webpack-vue\node_modules\webpack-cli\bin\convert-argv.js:140:15)

    at yargs.parse (E:\webpack-vue\node_modules\webpack-cli\bin\cli.js:241:39)

    at Object.parse (E:\webpack-vue\node_modules\yargs\yargs.js:552:18)

    at E:\webpack-vue\node_modules\webpack-cli\bin\cli.js:219:8

    at Object.<anonymous> (E:\webpack-vue\node_modules\webpack-cli\bin\cli.js:530:3)

    at Module._compile (module.js:652:30)

    at Object.Module._extensions..js (module.js:663:10)

    at Module.load (module.js:565:32)

    at tryModuleLoad (module.js:505:12)

    at Function.Module._load (module.js:497:3)

    at Module.require (module.js:596:17)

    at require (internal/module.js:11:18)

    at Object.<anonymous> (E:\webpack-vue\node_modules\webpack\bin\webpack.js:157:2)

    at Module._compile (module.js:652:30)

    at Object.Module._extensions..js (module.js:663:10)

    at Module.load (module.js:565:32)

    at tryModuleLoad (module.js:505:12)

    at Function.Module._load (module.js:497:3)

    at Function.Module.runMain (module.js:693:10)

    at startup (bootstrap_node.js:191:16)

    at bootstrap_node.js:612:3

npm ERR! code ELIFECYCLE

npm ERR! errno 1

npm ERR! webpack-vue@1.0.0 build: `webpack --config webpack.config.js`

npm ERR! Exit status 1

npm ERR!

npm ERR! Failed at the webpack-vue@1.0.0 build 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!     C:\Users\issuser\AppData\Roaming\npm-cache\_logs\2018-06-08T03_23_22_529Z-debug.log