message: Update quantities and hardcoded error messages
diff: @@ -81,9 +81,9 @@ async function quantityCheck (req, res, next, id, quantity) {
  if (product.quantity >= quantity) {
  next()
  } else {
  - res.status(400).json({ error: 'Stock Out, Please wait for a refill' })
  + res.status(400).json({ error: 'We are out of stock! Sorry for the inconvenience.' })
  }
  } else {
  - res.status(400).json({ error: 'The quantity of this item is limited to ' + product.limitPerUser + ' per user.' })
  + res.status(400).json({ error: 'You can order only up to ' + product.limitPerUser + ' items of this product.' })
  }
  }
  