How to give root access to all files in docker?

Question

linux

When running containers, docker creates a read-only src folder (project folder), how can I set root permissions for this folder?
docker-compose.yml

version: '3'

services:
  database:
    build:
      context: ./containers/database
    environment:
      - MYSQL_DATABASE=${DATABASE_NAME}
      - MYSQL_USER=${DATABASE_USER}
      - MYSQL_PASSWORD=${DATABASE_PASSWORD}
      - MYSQL_ROOT_PASSWORD=${DATABASE_ROOT_PASSWORD}
    ports:
      - "33063:3306"
    volumes:
      - ./containers/database/init.sql:/docker-entrypoint-initdb.d/init.sql
      - ./containers/database/data:/var/lib/mysql

  php-fpm:
    build:
      context: ./containers/php-fpm
    depends_on:
      - database
    environment:
      - APP_ENV=${APP_ENV}
      - APP_SECRET=${APP_SECRET}
      - DATABASE_URL=mysql://${DATABASE_USER}:${DATABASE_PASSWORD}@database:3306/${DATABASE_NAME}?serverVersion=5.7
    volumes:
      - ./src:/var/www

  nginx:
    build:
      context: ./containers/nginx
    volumes:
      - ./src:/var/www
      - ./containers/nginx/nginx.conf:/etc/nginx/nginx.conf
      - ./containers/nginx/sites/:/etc/nginx/sites-available
      - ./containers/nginx/conf.d/:/etc/nginx/conf.d
      - ./containers/logs:/var/log
    depends_on:
      - php-fpm
    ports:
      - "8020:80"

nginx dockerfiles

:

FROM nginx:alpine
WORKDIR /var/www
CMD ["nginx"]
EXPOSE 80

db:

FROM mariadb:latest
CMD ["mysqld"]
EXPOSE 3306

php fpm:

FROM php:fpm-alpine

COPY wait-for-it.sh /usr/bin/wait-for-it

RUN chmod +x /usr/bin/wait-for-it

RUN apk --update --no-cache add git

RUN docker-php-ext-install pdo_mysql

COPY --from=composer /usr/bin/composer /usr/bin/composer

WORKDIR /var/www

CMD composer install ; wait-for-it database:3306 -- bin/console doctrine:migrations:migrate ;  php-fpm

RUN apk add bash

RUN wget https://get.symfony.com/cli/installer -O - | bash && \
  mv /root/.symfony/bin/symfony /usr/local/bin/symfony

RUN /var/www

EXPOSE 9000

Answer 1

Tried to reproduce - did not work.
Docker by default starts its containers already as root and when creating a directory in the container directly from the host itself through the same Dockerfile, the directory is created with the user and group root and rights 755

Answer 2

The directory "./src" is not created, but forwarded to "/var/www", it's not clear why root is here and where to set the rights? In a container? On the host? I suppose that you need to edit the sources on the host while the container is running, then you need to set the user in the container with the same uid as on the host (usually 1000, see the "echo $UID" output in the console). You can set it via docker-compose.yml and of course users can be created and set in the Dockerfile