前言…

由于项目老大要求，服务器那边要放在二级域名下，这样能放更多项目（但其实一核一G放一个项目已经快爆了…）
不管怎样，还是要配置下的，毕竟以后一定会用到…

尝试

首先看一下 vue 关于打包的配置文件

这里现在又两个关于 build 的文件夹

在经过对这几个文件进行排查之后，我发现 config 下的 index.js 是关于打包路径的重要配置文件

大概长这样

'use strict'
// Template version: 1.2.6
// see http://vuejs-templates.github.io/webpack for documentation.

const path = require('path')

module.exports = {
  dev: {
    // Paths
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',
    proxyTable: {
      '/paperless': {
       target: 'http://192.168.31.132:80', // 132 206
       changeOrigin: true,
       pathRewrite: {
         '^/paperless': ''
       }
      }
    },

    // Various Dev Server settings
    host: 'localhost', // can be overwritten by process.env.HOST
    port: 9528, // can be overwritten by process.env.PORT, if port is in use, a free one will be determined
    autoOpenBrowser: true,
    errorOverlay: true,
    notifyOnErrors: false,
    poll: false, // https://webpack.js.org/configuration/dev-server/#devserver-watchoptions-

    // Use Eslint Loader?
    // If true, your code will be linted during bundling and
    // linting errors and warnings will be shown in the console.
    useEslint: true,
    // If true, eslint errors and warnings will also be shown in the error overlay
    // in the browser.
    showEslintErrorsInOverlay: false,

    /**
     * Source Maps
     */

    // https://webpack.js.org/configuration/devtool/#development
    devtool: 'cheap-source-map',

    // 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
  },

  build: {
    // Template for index.html
    index: path.resolve(__dirname, '../dist/index.html'),

    // Paths
    assetsRoot: path.resolve(__dirname, '../dist'),
    assetsSubDirectory: 'static',

    /**
     * You can set by youself according to actual condition
     * You will need to set this if you plan to deploy your site under a sub path,
     * for example GitHub pages. If you plan to deploy your site to https://foo.github.io/bar/,
     * then assetsPublicPath should be set to "/bar/".
     * In most cases please use '/' !!!
     */
    assetsPublicPath: (process.argv[2] && process.argv[2] == 'paperless_cms') ? '/paperless_cms/' : '/',

    /**
     * Source Maps
     */

    productionSourceMap: false,
    // https://webpack.js.org/configuration/devtool/#production
    devtool: 'source-map',

    // 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 || false,

    // `npm run build:prod --generate_report`
    generateAnalyzerReport: process.env.npm_config_generate_report || false
  }
}

而作为对打包路径最重要的配置在这里：
其实这里的注释已经提示我们了，如何去配置二级域名下的文件

之前一直没自信看，导致打包出来的文件放在二级域名下访问不到静态资源，

英语好的同学其实已经明白了，只需要将assetsPublicPath: 的路径改为 /middlePath/ 就可以了

然后执行 npm run build

成功打包文件

放到服务器上能看到页面了