How to upload pictures in Opencart 3?

Question

opencart

Good day!
The task on the main page is to display blocks with pictures and text information /
I'm trying to write my own module for displaying information.
with the recording of textual information, everything is clear in the controller

if (isset($this->request->post['field'])) {
      $data['field'] = $this->request->post['field'];
    } elseif (!empty($module_info)) {
      $data['field'] = $module_info['field'];
    } else {
      $data['field'] = '';
    }
 ну и в валидацию прописываем проверку

in the view

<div class="form-group">
            <label class="col-sm-2 control-label" for="input-field">{{ entry_field }}</label>
            <div class="col-sm-10">
              <input type="text" name="field" value="{{ field }}" placeholder="{{ entry_field }}" id="input-field" class="form-control" />
              {% if error_field %}
                <div class="text-danger">{{ error_field }}</div>
              {% endif %}
            </div>
          </div>

But how to upload a picture through the file manager?
In theory, the download field is also textual. downloading through the file manager, the download window should simply be called. but somehow hovered further)))