Get the image from a project folder and paste it to a template variable.

      '#template' => "<div>
                        <div><img src='{{ profile_picture }}' /></div>
                        <div>{{ competition_note }}</div>
                       // <div><img src='/modules/custom/bacademy_core/images/rosette.png' class='{{ badge_class }}'></div>
                        <div><img src='/{{ badge_image }}' class='{{ badge_class }}'></div>
                      </div>",
      '#context' => [
        'profile_picture' => $this->userHelperService->getProfilePicture('speaker'),
        'competition_note' => Link::createFromRoute($competition_note, 'view.my_cpd_record.page_1')->toString(),
        'badge_image' => drupal_get_path('module', 'bacademy_core') . 'images/rosette.png',
        'badge_class' => $class,
      ],
    ];