nuxt.config.js

console.log(process.env.DEPLOY_ENV)

export default {
  mode: 'spa',
  /*
  ** Headers of the page
  */
  head: {
    title: process.env.npm_package_name || '',
    meta: [
      { charset: 'utf-8' },
      { name: 'viewport', content: 'width=device-width, initial-scale=1' },
      { hid: 'description', name: 'description', content: process.env.npm_package_description || '' }
    ],
    script:[
      { src: '//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.15.8/highlight.min.js'},
      { src: 'https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2/MathJax.js?config=TeX-AMS_HTML'  }
    ],
    link: [
      { rel: 'icon', type: 'image/x-icon', href: '/favicon.ico' },
      { rel:'stylesheet' , href:'//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.15.8/styles/default.min.css'}
    ]
  },
  router: {
    base: process.env.DEPLOY_ENV === 'GH_PAGES' ? '/portfolio/' :'/'
  },
  /*
  ** Customize the progress-bar color
  */
  loading: { color: '#fff' },
  /*
  ** Global CSS
  */
  css: [
  ],
  /*
  ** Plugins to load before mounting the App
  */
  plugins: [
  ],
  /*
  ** Nuxt.js dev-modules
  */
  devModules: [
  ],
  /*
  ** Nuxt.js modules
  */
  modules: [
    // Doc: https://bootstrap-vue.js.org/docs/
    'bootstrap-vue/nuxt',
    '@nuxtjs/markdownit'
  ],
  markdownit: {
    preset: 'default',
    linkify: true,
    breaks: true,
    use: [
      'markdown-it-div',
      'markdown-it-attrs',
      'markdown-it-highlightjs'
    ],
    injected: true
  },
  /*
  ** Build configuration
  */
  build: {
    /*
    ** You can extend webpack config here
    */
    extend(config, ctx) {
    }
  }
}