Support PDF generation without available request object

aleksis/core/settings.py

 import os
 from glob import glob
+from socket import getfqdn
 
 from django.utils.translation import gettext_lazy as _
 
@@ -66,7 +67,7 @@ UWSGI = {
 UWSGI_SERVE_STATIC = True
 UWSGI_SERVE_MEDIA = False
 
-ALLOWED_HOSTS = _settings.get("http.allowed_hosts", [])
+ALLOWED_HOSTS = _settings.get("http.allowed_hosts", [getfqdn(), "localhost", "127.0.0.1", "[::1]"])
 
 # Application definition
 INSTALLED_APPS = [