version: '3.3'

services:
  postgresql:
    image: postgres:9.6
    environment:
      - POSTGRES_USER=injector
      - POSTGRES_PASSWORD=mypassword
      - POSTGRES_DB=injector
    ports:
      - "5432:5432"
  client:
    image: jbergknoff/postgresql-client
    entrypoint: sh -c "echo 'hello' && sleep 5 && psql postgresql://injector:mypassword@postgresql:5432/injector  -c 'SELECT * FROM pg_catalog.pg_tables'"
    depends_on:
      - postgresql