flora-6: postfix should use list.pub.solar as

hostname

- Send postmaster and root mails to admins@pub.solar
- Add TODO comment about django-keycloak

hosts/flora-6/mailman.nix

@@ -21,6 +21,9 @@ in {
       transport_maps = ["hash:/var/lib/mailman/data/postfix_lmtp"];
       local_recipient_maps = ["hash:/var/lib/mailman/data/postfix_lmtp"];
     };
+    rootAlias = "admins@pub.solar";
+    postmasterAlias = "admins@pub.solar";
+    hostname = "list.pub.solar";
   };
 
   services.mailman = {
@@ -32,6 +35,17 @@ in {
     siteOwner = "admins@pub.solar";
   };
 
+  # TODO add django-keycloak as auth provider
+  # https://django-keycloak.readthedocs.io/en/latest/
+  ## Extend settings.py directly since this can't be done via JSON
+  ## settings (services.mailman.webSettings)
+  #environment.etc."mailman3/settings.py".text = ''
+  #  INSTALLED_APPS.extend([
+  #    "allauth.socialaccount.providers.github",
+  #    "allauth.socialaccount.providers.gitlab"
+  #  ])
+  #'';
+
   systemd.services.mailman-uwsgi = let
     uwsgiConfig.uwsgi = {
       type = "normal";