一、修改router.js中添加base根目录配置
const vueRouter = new Router({mode: 'history',base: 'app',
二、修改vue.config.js中添加publicPath
module.exports = {publicPath: '/app/',
三、修改nginx.conf中的配置,设置二级目录
location ^~/app {alias /usr/local/app;try_files $uri $uri/ /app/index.html;}