docker exec -t (docker ps -q --filter name="name") pg_dumpall -U db_user -c > dump-(date +%d-%m-%Y"_"%H_%M_%S).psql
SELECT pg_terminate_backend(pg_stat_activity.pid)
FROM pg_stat_activity
WHERE pg_stat_activity.datname = 'TARGET_DB' -- ← change this to your DB
AND pid <> pg_backend_pid();
cat your_dump.sql | sudo docker exec -i (sudo docker ps -q --filter name="name") psql -U postgres