frequi_origin/vue.config.js

module.exports = {
  devServer: {
    proxy: {
      '/api': {
        target: 'http://127.0.0.1:8081',
        changeOrigin: true,
      },
    },
  },
  css: {
    loaderOptions: {
      sass: {
        prependData: `@import "@/styles/_variables.scss";`,
      },
    },
  },
};