CREATE TABLE IF NOT EXISTS product_images (
  id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  product_id INT UNSIGNED NOT NULL,
  image VARCHAR(255) NOT NULL,
  sort_order INT UNSIGNED NOT NULL DEFAULT 0,
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  CONSTRAINT fk_product_images_product
    FOREIGN KEY (product_id) REFERENCES products(id)
    ON DELETE CASCADE
);