Fixed size for course cover on courses page

apps/course/templates/course/_items.html

@@ -8,9 +8,9 @@
 >
 <a class="courses__preview" href="{% url 'course' course.id %}?next={{ request.get_full_path }}">
   {% if course.cover %}
-  <img class="courses__pic" src="{{ course.cover.image.url }}"/>
+  <img width="300px" height="170px" class="courses__pic" src="{{ course.cover.image.url }}"/>
   {% else %}
-  <img class="courses__pic" src="{% static 'img/no_cover.png' %}"/>
+  <img width="300px" height="170px" class="courses__pic" src="{% static 'img/no_cover.png' %}"/>
   {% endif %}
   <div class="courses__view">Подробнее</div>
   {% if course.is_featured %}