Add showmigrations target

Makefile

@@ -11,6 +11,9 @@ initialize: migrate loadfixtures
 	$(POETRY_RUN_MANAGE) create_oidc_client dashboard public --client-id ${DASHBOARD_OIDC_CLIENT_ID} --client-secret ${DASHBOARD_OIDC_CLIENT_SECRET} -r "id_token token" -u ${DASHBOARD_CALLBACK_BASE_URL}/oidc_callback.html -u ${DASHBOARD_CALLBACK_BASE_URL}/oidc_callback_silentRenew.html -p ${DASHBOARD_CALLBACK_BASE_URL} -p ${DASHBOARD_CALLBACK_BASE_URL}/
 	$(POETRY_RUN_MANAGE) create_oidc_client tank confidential --client-id ${TANK_OIDC_CLIENT_ID} --client-secret ${TANK_OIDC_CLIENT_SECRET} -r "code" -u ${TANK_CALLBACK_BASE_URL}/tank/auth/oidc/callback
 
+showmigrations:
+	$(POETRY_RUN_MANAGE) showmigrations
+
 migrate:
 	$(POETRY_RUN_MANAGE) migrate --no-input