docker-compose Postgres health-check

docker-compose.yml

version: "3"
services:
  postgress:
  ....
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"]
      interval: 10s
      timeout: 5s
      retries: 5
  app:
    ...
    depends_on:
      postgres:
        condition: service_healthy

Thank you zhunik very much!!! :)
For other people who want to know more about the command, please visit postgres documentation

Thanks! Worth noting is that pg_isready with just user specified will check against the db called the same as the username.

thanks!