Font not changing when deployed to heroku?

Question

Django

Hello! I am new to programming. I'm making a blog using django, the blog has a title, I want to change the font for it. I downloaded the font and installed it in static / fonts in the css file

@font-face {
    font-family: "AkademieAlte";
    font-style: normal;
    font-weight: normal;
    src: url("../fonts/AkademieAlte.ttf") format('truetype');
}

h1 a {
      color: #29ff07;
      font-family: 'AkademieAlte';

When I run python3 manage.py runserver
, everything works, but as soon as I deploy to heroku, nothing changes there.
Question: What am I doing wrong, is it somehow related to django or is it heroku?
Has anyone experienced this or something similar?

Answer 1

https://devcenter.heroku.com/articles/django-assets

Answer 2

python manage.py collectstatic ?