Migrations infra & working instance-control + commands

src/db-init.sql

@@ -40,7 +40,8 @@ create table user_selected_apps(
        nextcloud_version varchar(100),
        nassella_version varchar(100),
        log_viewer_version varchar(100),
-       ghost_version varchar(100)
+       ghost_version varchar(100),
+       instance_control_version varchar(100)
        );
 create unique index user_selected_apps_user_id_instance_id_idx on user_selected_apps (user_id, instance_id);
 
@@ -88,3 +89,8 @@ create table user_terraform_state(
        );
 
 create unique index user_terraform_state_user_id_instance_id_idx on user_terraform_state (user_id, instance_id);
+
+create table migrations(
+       id bigserial primary key,
+       migration_id integer not null unique,
+       );