PgBouncer + Postgres

docker-compose.yml

version: '3'
services:

  db:
    restart: always
    image: postgres:latest
    environment:
      - POSTGRES_USER=postgres
      - POSTGRES_PASSWORD=docker
    healthcheck:
      test: ["CMD", "pg_isready", "-U", "postgres"]

  pg-bouncer:
    restart: always
    image: edoburu/pgbouncer:latest
    environment:
      - DB_USER=postgres
      - DB_PASSWORD=docker
      - DB_HOST=db
      - DB_NAME=postgres
      - MAX_CLIENT_CONN=400
    ports:
      - 5432:5432
    depends_on:
      - db