next.config.js

const conf = {
    optimizeFonts: false,
    assetPrefix: `${process.env.NEXT_PUBLIC_BASE_PATH ? process.env.NEXT_PUBLIC_BASE_PATH : '/'}`,
    basePath: `${process.env.NEXT_PUBLIC_BASE_PATH ? process.env.NEXT_PUBLIC_BASE_PATH : ''}`,
    trailingSlash: !process.env.TRAILING_SLASH || process.env.TRAILING_SLASH !== 'off',
}

module.exports = conf