gcg-website/layouts/shortcodes/slider.html

<div class="card border-primary rounded-3">
  <div class="carousel carousel-dark slide mb-0" data-bs-ride="true" id='slider-{{ md5 (.Get "dir") }}'>
    {{ $dir := (.Get "dir") }}
    {{ with $dir }}
      {{ $files := readDir (print "/static/" .) }}
      <div class="carousel-indicators mb-0">
      {{ range $index, $file := $files }}
        {{ $isimg := lower $file.Name | findRE "\\.(gif|jpg|jpeg|tiff|png|bmp|webp|avif|jxl)" }}
        {{ if $isimg }}
          {{ $linkURL := print $.Site.BaseURL "/" ($.Get "dir") "/" $file.Name | absURL }}
          {{ if eq $index 0 }}
          <button type="button mb-5" data-bs-target="#slider-{{ md5 $dir }}" data-bs-slide-to="{{ $index }}" class="active"></button>
          {{ else }}
          <button type="button mb-5" data-bs-target="#slider-{{ md5 $dir }}" data-bs-slide-to="{{ $index }}"></button>
          {{ end }}
        {{ end }}
      {{ end }}
      </div>
      <div class="carousel-inner mb-0">
        {{ range $index, $file := $files }}
        {{ $isimg := lower $file.Name | findRE "\\.(gif|jpg|jpeg|tiff|png|bmp|webp|avif|jxl)" }}
        {{ if $isimg }}
          {{ $linkURL := print $.Site.BaseURL "/" ($.Get "dir") "/" $file.Name | absURL }}
          {{ if eq $index 0 }}
          <div class="carousel-item mb-0 active">
            <img src="{{ $linkURL }}" class="d-block w-100 mb-0 rounded-3">
          </div>
          {{ else }}
          <div class="carousel-item mb-0">
            <img src="{{ $linkURL }}" class="d-block w-100 mb-0 rounded-3">
          </div>
          {{ end }}
        {{ end }}
      {{ end }}
      </div>
    {{ end }}
    <button class="carousel-control-prev mb-0" type="button" data-bs-target="#slider-{{ md5 $dir }}" data-bs-slide="prev">
      <span class="carousel-control-prev-icon" aria-hidden="true"></span>
      <span class="visually-hidden">Zurück</span>
    </button>
    <button class="carousel-control-next mb-0" type="button" data-bs-target="#slider-{{ md5 $dir }}" data-bs-slide="next">
      <span class="carousel-control-next-icon" aria-hidden="true"></span>
      <span class="visually-hidden">Vor</span>
    </button>
  </div>
</div>