docker-compose.yml

version: '3.1'

services:
  db:
    image: postgres
    environment:
      POSTGRES_PASSWORD: example

  dump-restorer:
    image: postgres
    command:
      ["psql", "-h", "db", "-U", "postgres", "-W", "example", "<", "/root/dumps/latest.yml"]
    links:
      - db
    volumes:
      - .:/root/dumps

gistfile1.txt

docker run --name test-postgres -e POSTGRES_PASSWORD=mysecretpassword -t -i postgres bash