node and npm version are as blow
node -v
v6.9.2
npm -v
3.10.9

npm install is ok

but npm start is error, the detail info as below.

[email protected] start /Users/yanyx/GitRepo/angular2-seed
npm run server

[email protected] server /Users/yanyx/GitRepo/angular2-seed
webpack-dev-server --inline --progress --cors --port 3000 --content-base src

webpack-dev-server 2.1.0-beta.11
webpack 2.1.0-beta.27
Usage: http://webpack.github.io/docs/webpack-dev-server.html

Config options:
--config Path to the config file
[字符串] [默认值: webpack.config.js or webpackfile.js]
--env Enviroment passed to the config, when it is a function

Basic options:
--context The root directory for resolving entry point and stats
[字符串] [默认值: The current directory]
--entry The entry point [字符串]
--watch, -w Watch the filesystem for changes [布尔]
--debug Switch loaders to debug mode [布尔]
--devtool Enable devtool for better debugging experience (Example:
--devtool eval-cheap-module-source-map) [字符串]
-d shortcut for --debug --devtool eval-cheap-module-source-map
--output-pathinfo [布尔]
-p shortcut for --optimize-minimize --define
process.env.NODE_ENV="production" [布尔]
--progress Print compilation progress in percentage [布尔]

Module options:
--module-bind Bind an extension to a loader [字符串]
--module-bind-post [字符串]
--module-bind-pre [字符串]

Output options:
--output-path The output path for compilation assets
[字符串] [默认值: The current directory]
--output-filename The output filename of the bundle
[字符串] [默认值: [name].js]
--output-chunk-filename The output filename for additional chunks
[字符串] [默认值: filename with [id] instead of [name] or [id] prefixed]
--output-source-map-filename The output filename for the SourceMap [字符串]
--output-public-path The public path for the assets [字符串]
--output-jsonp-function The name of the jsonp function used for chunk
loading [字符串]
--output-pathinfo Include a comment with the request for every
dependency (require, import, etc.) [布尔]
--output-library Expose the exports of the entry point as library
[字符串]
--output-library-target The type for exposing the exports of the entry
point as library [字符串]

Advanced options:
--records-input-path Path to the records file (reading) [字符串]
--records-output-path Path to the records file (writing) [字符串]
--records-path Path to the records file [字符串]
--define Define any free var in the bundle [字符串]
--target The targeted execution enviroment [字符串]
--cache Enable in memory caching
[布尔] [默认值: It's enabled by default when watching]
--watch-stdin, --stdin close when stdin ends [布尔]
--watch-aggregate-timeout Timeout for gathering changes while watching
--watch-poll The polling intervall for watching (also enable
polling) [布尔]
--hot Enables Hot Module Replacement [布尔]
--prefetch Prefetch this request (Example: --prefetch
./file.js) [字符串]
--provide Provide these modules as free vars in all modules
(Example: --provide jQuery=jquery) [字符串]
--labeled-modules Enables labeled modules [布尔]
--plugin Load this plugin [字符串]
--bail Abort the compilation on first error [布尔]
--profile Profile the compilation and include information in
stats [布尔]
--hot-only Do not refresh page if HMR fails [布尔]

Resolving options:
--resolve-alias Setup a module alias for resolving (Example:
jquery-plugin=jquery.plugin) [字符串]
--resolve-extensions Setup extensions that should be used to resolve
modules (Example: --resolve-extensions .es6 .js)[数组]
--resolve-loader-alias Setup a loader alias for resolving [字符串]

Optimizing options:
--optimize-max-chunks Try to keep the chunk count below a limit
--optimize-min-chunk-size Try to keep the chunk size above a limit
--optimize-minimize Minimize javascript and switches loaders to
minimizing [布尔]

Stats options:
--info Info [布尔] [默认值: true]
--quiet Quiet [布尔]
--client-log-level Log level in the browser (info, warning, error or none)
[字符串] [默认值: "info"]

SSL options:
--https HTTPS [布尔]
--key Path to a SSL key. [字符串]
--cert Path to a SSL certificate. [字符串]
--cacert Path to a SSL CA certificate. [字符串]
--pfx Path to a SSL pfx file. [字符串]
--pfx-passphrase Passphrase for pfx file. [字符串]

Response options:
--content-base A directory or URL to serve HTML content from.[字符串]
--watch-content-base Enable live-reloading of the content-base. [布尔]
--history-api-fallback Fallback to /index.html for Single Page Applications.
[布尔]
--compress Enable gzip compression [布尔]

Connection options:
--port The port
--socket Socket to listen
--public The public hostname/ip address of the server [字符串]
--host The hostname/ip address the server will bind to
[字符串] [默认值: "localhost"]

选项：
--help, -h 显示帮助信息 [布尔]
--version, -v 显示版本号 [布尔]
--lazy Lazy [布尔]
--inline Inline mode (set to false to disable including client scripts
like livereload) [布尔] [默认值: true]
--open Open default browser [布尔]

无法识别的选项：cors

npm ERR! Darwin 15.6.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "run" "server"
npm ERR! node v6.9.2
npm ERR! npm v3.10.9
npm ERR! code ELIFECYCLE
npm ERR! [email protected] server: webpack-dev-server --inline --progress --cors --port 3000 --content-base src
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] server script 'webpack-dev-server --inline --progress --cors --port 3000 --content-base src'.
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 angular2-seed package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! webpack-dev-server --inline --progress --cors --port 3000 --content-base src
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs angular2-seed
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls angular2-seed
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! /Users/yanyx/GitRepo/angular2-seed/npm-debug.log

npm ERR! Darwin 15.6.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "start"
npm ERR! node v6.9.2
npm ERR! npm v3.10.9
npm ERR! code ELIFECYCLE
npm ERR! [email protected] start: npm run server
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] start script 'npm run 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 angular2-seed package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! npm run server
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs angular2-seed
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls angular2-seed
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! /Users/yanyx/GitRepo/angular2-seed/npm-debug.log