Answers for "how to put the contents of a bootstrap row in center of the div"

bootstrap col center content

<div class="row">
    <div class="col-4 d-flex justify-content-center text-center">
        // for image and text
    </div>
</div>

align eliment in center of row bootstrap

<div class="row justify-content-center">
  ...inner divs and content...
</div>