Django submission button doesn't link with view function

Question

I am trying to create a small subscription input form on top of my page that allows users to enter their email, click "submit" and then it will call the subscribe function on the back-end.

I am putting the form code in one of my template html file:

      <div class="container">
        <div class="wrapper d-flex align-items-stretch" style="margin-bottom: 100px;">
          {% include 'Reddit_app/sub_list.html' %}
          <div id="content" class="mr-4">
            <div class=" lt-area">
              <div class="tr-inner">
                <form action="{% url 'subscribe' station.slug %}" method="POST" class="subscribe-form">
                  <div class="form-group d-flex mb-1">
                    <div class="icon"><span class="icon-paper-plane"></span></div>
                    <input type="email" name="email" class="form-control" placeholder="Subscribe us">
                  </div>
                  <button type="button" class="btn btn-primary t-btn">Submit</button>

                </form>
              </div>
          </div>
            {% block content %}
            {% endblock %}
          </div>
        </div>
      </div>

Here is my urls.py

urlpatterns = [
    ...
    path('<slug:slug>/subscribe/', views.subscribe, name='subscribe'),
]

and here is my subscibe function, but right now when I click submit, this function is currently not even called

def subscribe(request, slug):
    station=get_object_or_404(Station, slug=slug)
    post_data = request.POST.copy()
    email = post_data.get("email", None)
    try:
        validate_email(email)
    except ValidationError as e:
        print("bad email, details:", e)
    return redirect('post_list', slug=station.slug)