Docker compose example - Postgres + adminer

.env

DATABASE_USER=postgres
DATABASE_PASSWORD=root
DATABASE_DBNAME=test

docker-compose.yml

version: "3.7"

services:
  postgres:
    image: postgres:12.3
    environment:
      POSTGRES_PASSWORD: ${DATABASE_PASSWORD}
      POSTGRES_USER: ${DATABASE_USER}
      POSTGRES_DB: ${DATABASE_DBNAME}
    ports:
      - 5416:5432

  adminer:
    image: adminer
    ports:
      - 8093:8080