Cannot connect to Postgres

[C-Jabbour]

Hello,

I have tried to run the commands individually and get the following error a couple of minutes after running this step:
docker-compose exec jupyter datacube -v system init

The error message:
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
sqlalchemy.exc.OperationalError: (psycopg2.OperationalError) could not connect to server: Connection timed out
Is the server running on host "postgres" (192.168.64.2) and accepting
TCP/IP connections on port 5432?

Appreciate any assistance.