Create postgresql instance through docker-compose

docker-compose.yml

version: '3.7'
services:
  pg:
    image: postgres:15-bullseye
    restart: always
    networks:
      - internal
    shm_size: 256mb
    healthcheck:
      test: [ 'CMD', 'pg_isready', '-U', 'postgres' ]
    ports:
      - 5432:5432
    volumes:
      - ./pg-data:/var/lib/postgresql/data
    environment:
      - POSTGRES_USER=postgres
      - POSTGRES_PASSWORD=root
      - POSTGRES_DB=postgres
    command: |
      postgres
        -c shared_preload_libraries=pg_stat_statements
        -c pg_stat_statements.track=all
        -c max_connections=200
        -c shared_buffers=256MB
        -c effective_cache_size=8GB
        -c work_mem=16MB
        -c maintenance_work_mem=128MB
        -c min_wal_size=128MB
        -c max_wal_size=2GB
        -c checkpoint_completion_target=0.9
        -c wal_buffers=16MB
        -c default_statistics_target=100
  pgadmin:
    image: dpage/pgadmin4:6
    restart: always
    networks:
      - internal
    ports:
      - 8080:80
      - 18080:443
    environment:
      - PGADMIN_DEFAULT_EMAIL=admin@example.com
      - PGADMIN_DEFAULT_PASSWORD=root

networks:
  internal:
    driver: bridge