Laravel, docker and postgresql

Dockerfile:

FROM php:8.1-fpm

RUN apt-get update && apt-get install -y \
    libpng-dev \
    libjpeg-dev \
    libfreetype6-dev \
    zip \
    unzip \
    && docker-php-ext-configure gd --with-freetype --with-jpeg \
    && docker-php-ext-install pdo_pgsql

RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer

WORKDIR /var/www/html

COPY composer.json composer.lock /var/www/html/

RUN composer install --no-scripts

COPY . /var/www/html

RUN chown -R www-data:www-data /var/www/html/storage /var/www/html/bootstrap/cache

CMD ["php-fpm"]

docker-compose.yml

version: '3.7'
services:
  php:
    image: php:8.1-fpm
    container_name: my-laravel-app-php
    volumes:
      - ./application:/var/www/html
    working_dir: /var/www/html
    networks:
      - laravel-net

  nginx:
    image: nginx:latest
    container_name: my-laravel-app-nginx
    ports:
      - "80:80"
    volumes:
      - ./application:/var/www/html
      - ./nginx/nginx.conf:/etc/nginx/conf.d/default.conf
    depends_on:
      - php
    networks:
      - laravel-net

  postgres:
    image: postgres:latest
    container_name: my-laravel-app-postgres
    environment:
      POSTGRES_DB: laravel_db
      POSTGRES_USER: laravel_user
      POSTGRES_PASSWORD: secret_password
    volumes:
      - pg-data:/var/lib/postgresql/data
    networks:
      - laravel-net

networks:
  laravel-net:

volumes:
  pg-data:

In the .env file, I use the data specified in the environment in postgres to connect to the database, but the connection is still missing, what should I do?

when executing DB::connection()->getPdo(); i get a PDOException could not find driver. how is this possible if the installation is in the Dockerfile?