Where's "redash" database on postgres?

Just a question.
I usually use 4.0.1 and see the data in postgres by sudo -u postgres redash command.
But today I set up docker based redash 5.0.0. on my local environment, and the command above returns psql: FATAL: database "redash" does not exist.
So I went in to postgres container by docker exec, and found the data is in the database called postgres.
Maybe the database name is changed since 5.0.0? No trouble to use redash, but I’m just curious.

Yes, we no longer create a separate database for Redash since we switched to Docker containers.

Thanks! I use EC2 AMI in my work so didn’t know well about docker containers.