Import postgresql dumps on docker composer and create multiples databases

compose.yml

services:
  postgres:
    image: postgres:latest
    environment:
      - 'POSTGRES_DATABASES=database_1,database_2'
      - 'POSTGRES_PASSWORD=password'
      - 'POSTGRES_USER=postgres'
    healthcheck:
      test: exit $$DUMPS_IMPORTED # Use variable created on multiple-database.sh for checke if dumps were imported
      interval: 5s
      timeout: 60s
      retries: 10
    volumes:
      - ./pg-init:/docker-entrypoint-initdb.d # put multiple-database.sh script on ./pg-init
      - ./dumps_folder:/dumps # put the dumps files on ./dumps_folder
      - postgres_data:/var/lib/postgresql/data
    ports:
      - '5432:5432'
  volumes:
    postgres_data:

multiple-database.sh

#!/bin/bash

set -e
set -u

export DUMPS_IMPORTED=1 # for health checker

function restore_database() {
  dump_folder="/dumps"
  dump_file="$dump_folder/$1.sql"
  if [ -f "$dump_file" ]; then
        echo "Restoring $dump_file"
        pg_restore -U "$POSTGRES_USER" -d "$1" -1 "$dump_file" --clean --if-exists --no-owner
  else
      echo "Dump for database $1 not found!"
  fi
}

function create_database() {
    local database="$1"
    echo "Creating user and database '$database'"
    psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" <<-EOSQL
        CREATE DATABASE $database;
        GRANT ALL PRIVILEGES ON DATABASE $database TO $POSTGRES_USER;
EOSQL
    
}

if [ -n "$POSTGRES_DATABASES" ]; then
    IFS=',' read -ra items <<< "$POSTGRES_DATABASES"
    echo "Multiple database creation requested: $POSTGRES_DATABASES"
    for db in "${items[@]}"; do
        create_database "$db"
        restore_database "$db"
    done
    echo "Multiple databases created"
fi

export DUMPS_IMPORTED=0