feat(backend): add unlisted members, private member list, custom members header

scripts/migrate/012_custom_options.sql

@@ -0,0 +1,8 @@
+-- +migrate Up
+
+-- 2023-04-01: Add a couple customization options to users and members
+
+alter table users add column member_title text;
+alter table users add column list_private boolean not null default false;
+
+alter table members add column unlisted boolean not null default false;