flask_photo_scaling_app/app/templates/delete_photo.html

<style>
.formContainer {
  align-items: center;
  margin-top: 100px;
}

#submitContainer {
  margin-top: 100px;
}
</style>

{% extends "base.html" %}

{% block content %}
  <div class='formContainer'>
    
    <form action={{ url_for('delete', photo_id=photo.id) }} method="post" novalidate>
      <h2>Delete Photo?</h2>
      <img style="width: 100%;" src={{ photo_url + '480_' + photo['photo_name'] }} alt={{ '480_' + photo['photo_name'] }}>
      {{ form.hidden_tag() }}
      <p id="submitContainer">{{ form.submit() }}</p>
    </form>
  </div>
{% endblock %}