Docker how to clear files on read only so I can change it directly from my computer and not container? – Phpmyadmin

I created a docker-compose.yml file with the code below :

version: "3.8"
services:

  db:
    image: mysql:latest
    command: --default-authentication-plugin=mysql_native_password
    container_name: docker_database
    restart: always
    volumes:
      - db-data:/var/lib/mysql
    environment:
      - MYSQL_ROOT_PASSWORD=root
    networks:
      - dev

  phpmyadmin:
    image: phpmyadmin:latest
    container_name: docker_phpmyadmin
    restart: always
    depends_on:
      - db
    ports:
      - 8081:80
    environment:
      PMA_HOST: db
    networks:
      - dev

  prestashop:
    build: php
    container_name: docker_prestashop
    ports:
      - 8080:80
    volumes:
      - ./php/vhosts:/etc/apache2/sites-enabled
      - ./:/var/www/html
    restart: always
    networks:
      - dev

networks:
  dev:

volumes:
  db-data:

And also this Dockerfile :

FROM php:7.4-apache

RUN echo "ServerName localhost" >> /etc/apache2/apache2.conf

RUN apt-get update 
    && apt-get install -y --no-install-recommends locales apt-utils git libicu-dev g++ libpng-dev libxml2-dev libzip-dev libonig-dev libxslt-dev;

RUN echo "en_US.UTF8 UTF8" > /etc/locale.gen && 
    echo "fr_FR.UTF-8 UTF-8" >> /etc/locale.gen && 
    locale-gen

RUN curl -sSk https://getcomposer.org/installer | php -- --disable-tls && 
    mv composer.phar /usr/local/bin/composer

RUN docker-php-ext-configure intl
RUN docker-php-ext-install pdo pdo_mysql gd opcache intl zip calendar dom mbstring zip gd xsl
RUN pecl install apcu && docker-php-ext-enable apcu
RUN a2enmod rewrite && service apache2 restart

The goal is to create a prestashop environnement however I’m struggling with a Error 500 when trying to install the prestashop. I’ve read that it has something to do with file permissions. Some of the folders are accessible but I don’t know why some of them like the config folder is in read-only. I’ve created a volume that I share with container and host but I think I did something wrong on the configuration.
Even when I run a chmod 770 <some-file> I can access it but when I’m trying to change something in it I get this error :

Cannot save /home/benju/Bureau/docker/config/defines.inc.php.
Unable to create a backup file (defines.inc.php~).
The file left unchanged.

How could I access them with the same permission as the container on the host computer ?