Can't generate faker image in Laravel

Question

I have a problem with my code. I try to generate a faker image in Laravel 8, but it's not showing like the image in my path.

PostFactory

class PostFactory extends Factory
{
    /**
     * Define the model's default state.
     *
     * @return array
     */
    public function definition()
    {
        return [
            'title' => $this->faker->sentence(mt_rand(2, 8)),
            'slug' => $this->faker->slug(),
            'excerpt' => $this->faker->paragraph(),
            'image' => $this->faker
                ->image('public/img/posts', 640, 480, null, false),
            'body' => $this->faker->paragraph(mt_rand(5, 10)),
            'user_id' => mt_rand(1, 3),
            'category_id' => mt_rand(1, 2)
        ];
    }
}

Blade/View

 <img width="600" class="rounded" src="/img/posts/{{ $post->image }}" 
     alt="/img/posts/{{ $post->image }}">