Configure Revalidate Route
Revalidate routes in Next.js
Implement on-demand revalidation using an API routes at /revalidate.
If you're using the Basic Starter, revalidate route are already created for you. You can skip this step.
/pages/api/revalidate.ts
pages/api/revalidate.ts
import { NextApiRequest, NextApiResponse } from "next"
export default async function handler(  request: NextApiRequest,  response: NextApiResponse) {  let slug = request.query.slug as string  const secret = request.query.secret as string
  // Validate secret.  if (secret !== process.env.DRUPAL_REVALIDATE_SECRET) {    return response.status(401).json({ message: "Invalid secret." })  }
  // Validate slug.  if (!slug) {    return response.status(400).json({ message: "Invalid slug." })  }
  try {    await response.revalidate(slug)
    return response.json({})  } catch (error) {    return response.status(404).json({      message: error.message,    })  }}