Creating Image Blocks programmatically

An image block looks basically like this:

$image = new Kirby\Cms\Block([
  'content' => [
    'location' => 'kirby',
    'image' => [
      "dark-forest.jpg"
    ],
  ],
  'type' => 'image',
]);
$blocks = $page->text()->toBlocks();
$blocks = $blocks->add(new Kirby\Cms\Blocks([$image]));
$kirby->impersonate('kirby');

$page->update([
  'text' => json_encode($blocks->toArray()),
]);