Add user authentication to index and user collections views; update CSRF trusted origins and internal IPs

atlas/views.py

@@ -1090,10 +1090,12 @@ def author_list(request):
     return render(request, "atlas/author_list.html", {"authors": authors})
 
 
+@login_required
 def index(request):
     return render(request, "atlas/index.html", {})
 
 
+@login_required
 def user_collections(request):
     # Collections the user is explicitly allowed to take (via CaseCollection.valid_user_users)
     available_collections = request.user.user_casecollection_exams.all()