yaml
//docker-compose.yml
version: '3'

services:
  database:
    image: postgres
    restart: always
    ports:
      - '5432:5432'
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: pass123
      POSTGRES_DB: my_db

  supertokens:
    image: supertokens/supertokens-postgresql
    restart: always
    ports: 
      - '3567:3567' 
    environment:
      POSTGRESQL_USER: postgres
      POSTGRESQL_PASSWORD: pass123
      POSTGRESQL_HOST: database
      POSTGRESQL_PORT: 5432
      POSTGRESQL_DATABASE_NAME: my_db