configs.js

const version = require('package.json').version;

const config = {
  development: {
    assetPrefix: ''
  },
  staging: {
    assetPrefix: `https://static.com/CHOTOT_VEHICLE_STAGING/${version}`
  },
  production: {
    assetPrefix: `https://static.com/CHOTOT_VEHICLE_PRODUCTION/${version}`
  }
};

module.exports = config;

next.config.js

const config = require('./config').config;

module.exports = {
  assetPrefix: config.assetPrefix,
  generateBuildId: async () => {
    return 'build';
  },
  webpack(config, options) {
    return config;
  }
};