Databases backup
Postgres DB
docker exec -t your-db-container pg_dumpall -c -U postgres | gzip > dump_`date +%d-%m-%Y"_"%H_%M_%S`.sql
Restore your databases
cat your_dump.sql | docker exec -i your-db-container psql -U postgres
With mySQL
cat dump.sql | docker-compose exec -T <mysql_container> mysql -u <db-username> -p<db-password> <db-name>