fix Collaborate template
<td>
<div style="float: left; margin-bottom: 3em; margin-right: 2em">
<a style="text-decoration: none" href="{% url 'groups' %}"><img
- src="{% static '/img/groups.png' %}"><h4 style="text-align: center">GROUPS</h4></a>
+ src="{% static 'img/groups.png' %}"><h4 style="text-align: center">GROUPS</h4></a>
</div>
</td>
<td>
