https://www.postgresqltutorial.com/postgresql-backup-database/
docker exec -t your-db-container pg_dump -U strapi -W -F t database-name > mypostgres_strapi_`date +%d-%m-%Y"_"%H_%M_%S`.sql
docker exec -t your-db-container pg_dumpall -c -U postgres > dump_`date +%d-%m-%Y"_"%H_%M_%S`.sql