feat: add basic nextcloud role

nextcloud with optional collabora base setup

roles/nextcloud/templates/init-db.sql.j2

@@ -0,0 +1,10 @@
+-- Grant necessary permissions to the Nextcloud PostgreSQL user
+-- CREATEROLE allows creating roles for Nextcloud apps
+ALTER USER {{ nextcloud_postgres_user }} WITH CREATEROLE;
+
+-- Pre-create the Nextcloud database to prevent automatic user creation
+CREATE DATABASE {{ nextcloud_postgres_db }} OWNER {{ nextcloud_postgres_user }};
+
+-- Grant CREATE permission on public schema in the new database
+\c {{ nextcloud_postgres_db }}
+GRANT CREATE ON SCHEMA public TO {{ nextcloud_postgres_user }};