example_test.js

exports.getProducts = async  (req, res, next) => {
  const docs = await Product.find()
      .select('_id price productImage')

  const response = {
    count: docs.length,
    docs: docs.map(doc => ({
        _id: doc._id,
        price: doc.price,
        request: {
          type: 'get',
          url: `https://localhost:3100/${doc._id}`
        },
        ...(
          doc.productImage
          ? {
            productImage: `https://localhost:3100/${doc.productImage}`,
          }
          : {}
        )
      })
    )
  }

  return res.json(response)
}