flask_photo_scaling_app/app/templates/upload.html

{% extends "base.html" %}

{% block content %}
  <div class="formContainer">
    <h1>{{ title }}</h1>
    <form action="" method="post" enctype="multipart/form-data" novalidate>
      {{ form.hidden_tag() }}
      <p>
      {{ form.image.label }}<br>
        <span class="inputInfo imageInputInfo">
          suggest max 3MB
        </span><br>
        {{ form.image(style="width: 100%; margin-top: 40px;") }}
      </p>
      <p>{{ form.submit() }}</p>
    </form>
  </div>
{% endblock %}