app.post("/products", async (req, res) => {
  const { error } = Joi.validate(req.body, productSchema, { abortEarly: false });

  if (error) {
    const errorMessage = error.details.map(({ message, context }) =>
      Object.assign({ message, context })
    );
    return res.status(400).send({ data: errorMessage });
  }

  const product = await Product.create(req.body);

  res.status(201).send();
});