pg_dump from docker container code example
Example: pg_dump docker
docker exec -i pg_container_name pg_dump --username pg_username [--password pg_password] database_name > /desired/path/on/your/machine/dump.sql
docker exec -i pg_container_name pg_dump --username pg_username [--password pg_password] database_name > /desired/path/on/your/machine/dump.sql