version: '2.4'
services:
  postgres:
    image: postgres:13.1-alpine
    environment:
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
      PGDATA: /var/lib/postgresql/data/pgdata
    networks:
      - postgres_net
    volumes:
      - /var/lib/postgresql/data:/var/lib/postgresql/data
    ports:
      - 5432:5432
networks:
  mariadb_net:
    name: postgres_net
    driver: bridge