Can't connect to DB

[SwithFr]

Hi!

I'm probably stupid but I can't connect to the database with laravel. What should I put in the .env file?
I've tried everything:

• port tested: 5432
• host tested: localhost, 127.0.0.0.1, pgsql

this is my docker-composer:

services:

  php:
    image: swithfr/php:7.2
    volumes:
      - ".:/var/www/laratest"

  nginx:
    image: nginx:latest
    volumes:
      - "./docker/nginx.conf:/etc/nginx/conf.d/default.conf"
    links:
      - php
    ports:
      - 8888:80

  pg-master:
      image: swithfr/pgsql-replication
      restart:'always'.
      environment:
        POSTGRES_USER: "postgres
        POSTGRES_PASSWORD:'postgres'.
        PGDATA:'/var/lib/postgresql/data/pgdata'
      volumes:
       - '/var/lib/postgresql/data'
      exposes:
       - '5432'

  pg-slave:
    image: swithfr/pgsql-replication
    restart:'always'.
    environment:
      POSTGRES_USER: "postgres
      POSTGRES_PASSWORD:'postgres'.
      PGDATA:'/var/lib/postgresql/data/pgdata'
      REPLICATE_FROM: "pg-master
    volumes:
     - '/var/lib/postgresql/data'
    exposes:
     - '5432'
    links:
     - "pg-master

swithfr/pgsql-replication is a copy of your Dockerfile with just the addition of these lines

RUN apt-get update 
RUN apt-get install iputils-ping -y