How to connect to the PostgreSQL database from outside the container

I have a postgres database in docker-compose.yaml

services:
    ... 
    db:
        image: postgres:12.0-alpine
        volumes:
            - postgres_data:/var/lib/postgresql/data/
        environment:
            - POSTGRES_USER=username
            - POSTGRES_PASSWORD=password
            - POSTGRES_DB=dbname
        ports:
            - "5432:5432"
        expose: 
            - 5432

I can connect to db like that:

docker exec -ti CONTAINER_NAME-db bash
bash-5.0# psql -U username -d dbname -h db
Password for user username: 
psql (12.0)
Type "help" for help.

dbname=# 

How to connect to the PostgreSQL database from outside the container???

I was trying:

1) psql -U username -d dbname -h db. 
NO OUTPUT

2) psql -h localhost -p 5432 -U username -d dbname
psql: error: connection to server at "localhost" (127.0.0.1), port 5432 failed: FATAL:  role "username" does not exist

3) psql -h 0.0.0.0 -p 5432 -U username -d dbname
psql: error: connection to server at "0.0.0.0", port 5432 failed: FATAL:  role "username" does not exist

In my situation problem deals with postgres on localhost

Solution

brew services
brew services stop postgresql@15

After these commands I can connect to DB:

psql -h localhost -p 5432 -U username -d dbname