Nuxt Detect Server Base Url

function detectServerBaseUrl(req) {  if (req.headers.referer) {    const url = new URL(req.headers.referer)    return `${url.protocol}//${url.host}`  }  else if (req.headers.host) {    const protocol = req.connection.encrypted ? 'https' : 'http:'    return `${protocol}//${req.headers.host}`  }  else if (req.connection.remoteAddress) {    const protocol = req.connection.encrypted ? 'https' : 'http:'    return `${protocol}//${req.connection.localAddress}:${req.connection.localPort}`  }  return undefined}