修改vue+webpack run build的路径方法

// see http://vuejs-templates.github.io/webpack for documentation.
var path = require('path')

module.exports = {
 build: {
 env: require('./prod.env'),
 index: path.resolve(__dirname, '../dist/index.html'),
 assetsRoot: path.resolve(__dirname, '../dist'),
 assetsSubDirectory: 'static',
 assetsPublicPath: '/',
 productionSourceMap: true,
 // Gzip off by default as many popular static hosts such as
 // Surge or Netlify already gzip all static assets for you.
 // Before setting to `true`, make sure to:
 // npm install --save-dev compression-webpack-plugin
 productionGzip: false,
 productionGzipExtensions: ['js', 'css'],
 // Run the build command with an extra argument to
 // View the bundle analyzer report after build finishes:
 // `npm run build --report`
 // Set to `true` or `false` to always turn it on or off
 bundleAnalyzerReport: process.env.npm_config_report
 },
 dev: {
 env: require('./dev.env'),
 port: 8080,
 autoOpenBrowser: true,
 assetsSubDirectory: 'static',
 assetsPublicPath: '/',
 proxyTable: {},
 // CSS Sourcemaps off by default because relative paths are "buggy"
 // with this option, according to the CSS-Loader README
 // (https://github.com/webpack/css-loader#sourcemaps)
 // In our experience, they generally work as expected,
 // just be aware of this issue when enabling this option.
 cssSourceMap: false
 }
}