docker-compose file with "wait-for-it"

docker-compose.yaml

version: '3.1'

services:
  db:
      container_name: pg_container
      image: postgres
      restart: always
      environment:
          POSTGRES_USER: "postgres"
          POSTGRES_PASSWORD: "pg12345"
          POSTGRES_DB: "db"
          POSTGRES_HOST_AUTH_METHOD: trust
      ports:
          - "5432:5432"
      networks:
        - postgres        

  ingestion:
      build: ./ingestion/
      container_name: ingestion
      networks:
        - postgres
      depends_on:
        - db
      command: bash -c "/usr/wait-for-it.sh --timeout=0 db:5432 && python -u ./app/main.py"
      volumes:
      - ./ingestion/app/data:/ingestion/app/data/:z

  api:
      build: ./api/
      container_name: api
      ports:
          - "8080:8080"
      networks:
        - postgres
      depends_on:
        - ingestion        

networks:
  postgres:
    driver: bridge