public async ValueTask <ActionResult> UploadBook(string description, string language, IFormFile content)
{
using var stream = content.OpenReadStream();
var bookId = await _bookRepository.NextBookIdAsync();
var book = new Book(bookId, new(language), new(description));
var bookContent = new BookContent(bookId, stream);
await _bookRepository.AddBookWithContentAsync(book, bookContent);
var result = new { bookId = bookId.Value };
return(CreatedAtAction(nameof(GetBookById), result, result));
}
