mkdir -p /app/persistent_docker/postgres/data
cd /app/persistent_docker/postgres

cat docker-compose.yaml
# Use postgres/example user/password credentials
version: '3.1'

services:

  db:
    image: postgres
    restart: always
    environment:
      POSTGRES_PASSWORD: secret
      PGDATA: /var/lib/postgresql/data/pgdata
    volumes:
     - /app/persistent_docker/postgres/data:/var/lib/postgresql/data
    ports:
      - 5432:5432

  adminer:
    image: adminer
    restart: always
    ports:
      - 8080:8080

docker-compose up -d
docker update --restart unless-stopped $(docker ps -q)

# adminer URL: http://192.168.0.91:8080/
# connect from remote machine
psql -h socorro  -U postgres -d postgres