페이징

const handler = createHandler();

handler.get(async (req, res) => {
  var index = Number(req.query.start_index);
  var page_size = Number(req.query.page_size);

  console.log(index, page_size);
  const posts = await Post.find({})
    .populate("email")
    .skip(index)
    .limit(page_size);

  res.status(200).json(posts);
});