Create a postgres database within a docker-compose.yml file - postgresql

Question

I want to create a postgres database named bank within a docker-compose.yml file just after the postgres container has started but when i run docker-compose --env-file .env -f docker-compose.yaml up -d i get this error: /var/run/postgresql:5432 - no response...
when i remove the line with the command: option, everything start correctly and i get: /var/run/postgresql:5432 - accepting connections
But now, i have to run this steps by steps in the terminal:
docker exec -it postgres bash
psql -U my_user_name
create database bank;
and exit
And i really don't want it to work like that, instead, i want the database to be created within the docker-compose file. (Note that, when i remove the command: option, and i run until pg_isready; do sleep 1; done; echo accepting; inside the container, it ouput accepting almost immediately)
The POSTGRES_DB env variable doesn't work, The username is still used as default
This is my docker-compose file:
services:
db:
container_name: postgres
image: postgres
environment:
- POSTGRES_USER=${POSTGRES_USER}
- POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
- PGDATA=/data/postgres
volumes:
- db:/data/postgres
ports:
- "5332:5432"
networks:
- db
restart: unless-stopped
healthcheck:
test: [ "CMD-SHELL", "pg_isready -d postgres" ]
interval: 30s
timeout: 10s
retries: 5
command: /bin/bash -c "until pg_isready -U ${POSTGRES_USER} -p 5432; do sleep 1; done; psql -U ${POSTGRES_USER} -c 'CREATE DATABASE bank;'"
networks:
db:
driver: bridge
volumes:
db:
The most important line is the one with command: :
command: /bin/bash -c "until pg_isready -U ${POSTGRES_USER} -p 5432; do sleep 1; done; psql -U ${POSTGRES_USER} -c 'CREATE DATABASE bank;'"
Please help me with the correct command to execute so that the database will be created automatically when running docker-compose --env-file .env -f file up -d

Answer 1

Have you considered using the POSTGRES_DB environment variable ?
services:
db:
container_name: postgres
image: postgres
environment:
POSTGRES_USER: ${POSTGRES_USER}
POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
PGDATA: /data/postgres
POSTGRES_DB: bank
volumes:
- db:/data/postgres
ports:
- "5332:5432"
networks:
- db
restart: unless-stopped
healthcheck:
test: [ "CMD-SHELL", "pg_isready -d postgres" ]
interval: 30s
timeout: 10s
retries: 5
networks:
db:
driver: bridge
volumes:
db: